KR101933844B1 - Novel 6-fused heteroaryldihydropyrimidines for the treatment and prophylaxis of hepatitis b virus infection - Google Patents

Abstract

상기 식에서,
R¹, R², R³, R⁴, R⁵, R⁶, X, Y, W 및 n은 본원에 기재된 바와 같다.The present invention provides novel compounds of formula (I), compositions comprising such compounds and methods of use of said compounds. Such compounds are useful in therapy and / or prevention in humans, and in particular are hepatitis B virus (HBV) inhibitors which target HBV capsids for the treatment of HBV infection:
(I)

In this formula,
R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , X, Y, W and n are as described herein.

Description

FIELD OF THE INVENTION [0001] The present invention relates to 6-fused heteroaryldihydropyrimidines for the treatment and prevention of hepatitis B virus infections. ≪ RTI ID = 0.0 >

The present invention relates to an HBV inhibitor which targets HBV capsids for the treatment of organic compounds useful in therapy and / or prevention in humans, especially HBV infections.

The present invention relates to novel 6-fused heteroaryl dihydropyrimidines having pharmacological activity, their preparation, pharmaceutical compositions containing them and their possible uses as medicaments.

The present invention relates to compounds of formula (I), or pharmaceutically acceptable salts, enantiomers or diastereomers thereof, wherein:

(I)

In this formula,

R ¹ to R ⁶ , X, Y, W and n are as described below.

Hepatitis B virus (HBV) is a species of hepadnavirus and family viruses. HBV is a serious public health problem worldwide, with more than 400 million people in the Asia-Pacific region being chronically infected by this small enveloped DNA virus. While most people appear to resolve the infection after acute symptoms, 15-40% of HBV patients will eventually develop clinical disease, especially hepatitis, liver cirrhosis and hepatocellular carcinoma during their lifetime. Every year, between 500,000 and 1 million people die from liver disease caused by HBV infection.

The HBV life cycle begins with the combination of "Dane" particles and unidentified receptors on the surface of the hepatocytes. After entry, the viral genome is transferred to the nucleus, where the covalently bound cystic DNA (cccDNA) is formed through DNA repair of the viral relaxed circular DNA. Unlike most other DNA virus mechanisms, HBV cccDNA is replicated through reverse transcription of a 1.1-genome unit-length RNA copy (pregenomic RNA). Viral precursor genomic RNA interacts with two other viral components, namely, capsid proteins and polymerases, as well as some host factors, to form capsid particles where viral DNA replication occurs. Subsequently, most copies of the genome encapsidated with capsids are efficiently associated with envelope proteins for virion assembly and secretion; Replace a few of these genomes with nuclei and convert them to cccDNA.

Currently, there are two types of anti-HBV agents in the market: nucleoside (nucleotide) analogues (lamivudine, adefovir, tenofovir, telbivudine and entecavir) targeting the viral polymerase, Interferon that regulates immune function. Mutations in the primary sequence of polymerases conferring resistance to lamivudine and adefovir have been clinically validated and have been shown to be associated with baseline serum viral titer rebound (70% of patients who have started lamivudine therapy and have been treated within 3 years) Respectively. Resistance to telbivudine, adefovir and entecavir occurred less frequently but was recorded. Interferon alpha is another major therapy available for hepatitis B, but is limited by poor long-term response and constipation adverse reactions. Some virus genotypes do not show a good response to interferon therapy. Now, standard clinical cure for HBV infection is loss of HBsAg and / or serum conversion. The majority of patients treated (more than 90%) fail to achieve this goal. This problem is mainly due to the presence of a stable pool of viral cccDNA that can not replicate in the nucleus itself and therefore does not show access to nucleoside (nucleotide) analogs.

For this reason, there is a clear medical need for therapies and diverse approaches with improved features in the development of therapies for HBV infection.

HBV capsid proteins play an essential role in HBV replication. HBV has an icosahedral core that contains 240 copies of the capsid (or core) protein. The prominent biological function of the capsid protein is to act as a structural protein to encapsulate the precursor genomic RNA and form immature capsid particles in the cytoplasm. This step is a prerequisite for viral DNA replication. HBV capsids self-assemble spontaneously from many copies of core dimers present in the cytoplasm. The formation of trimer nuclei and subsequent elongation reactions have been demonstrated to occur by adding one dimeric subunit at a time until addition is complete. In addition to this function, the capsid protein regulates viral DNA synthesis through different phosphorylation states of its C-terminal phosphorylation site. When almost full-length relaxed circular DNA is formed through reverse-transcription of the virus precursor genome RMA, immature capsids become mature capsids. On the other hand, the capsid protein can promote nuclear translocation of the viral relaxation annular genome by a nuclear localization signal located in the arginine-rich domain of the C-terminal region of the capsid protein. In the nucleus, as a component of the viral cccDNA chromosome, the capsid protein can play a structural regulatory role in the functional group of the ccc DNA chromosome. The capsid protein also interacts with the viral envelope proteins in the endoplasmic reticulum and triggers the release of intact viral particles from the hepatocytes.

A pair of capsids associated with anti-HBV inhibitors have been reported. For example, phenylpropenamide derivatives including compounds named AT-61 and AT-130 (Feld J. et al., Antiviral Research 2007 , 168-177), and Valeant R & D 2006/033995) disclose that a group of thiazolidin-4-ones lt; RTI ID = 0.0 > pgRNA < / RTI > Recent studies have suggested that phenylpropenamide is in fact a promoter of HBV capsid assembly, and that its action results in the formation of empty capsids. These very interesting results illustrate the importance of the motor pathway in successful viral assembly.

Heteroaryl dihydropyrimidines or HAPs comprising compounds named Bay 41-4109, Bay 38-7690 and Bay 39-5493 were found in tissue culture based screening (Deres K. et al., Science 2003 , 893). Such HAP analogs can act as synthetic allosteric activators and induce the formation of strange capsids that cause degradation of the core protein. In addition, HAP analogs temporarily reorganize core proteins from pre-assembled capsids to non-capsid polymers by interfering with HAPs, perhaps solved during the capsid 'breathing' to temporarily block individual subunits binding. Bay 41-4109 was administered to HBV infected transgenic or humanized mouse models and demonstrated in vivo efficacy with HBV DNA reduction (Deres K. et al., Science 2003 , 893); [Brezillon N. et al., PLoS ONE 2011 , e25096). It also exhibited bis-AN, which acts as a molecular 'wedge' and is a small molecule that interferes with normal capsid protein geometry and capsid formation (Zlotnick A. et al., J. Virol. 2002 , 4848-4854 ]).

The present invention relates to a novel compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:

(I)

In this formula,

R ¹ is hydrogen, halogen or C _1-6 alkyl;

R < ² > is hydrogen or halogen;

R < ³ > is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R ⁵ is hydrogen, hydroxyC _1-6 alkyl, aminocarbonyl, C _1-6 alkoxycarbonyl or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O- or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, C _1-6 alkyl, halo C _1-6 alkyl, C _3-7 cycloalkyl, -C _m H _2m - , -C _1-6 alkoxycarbonyl-C _m H _2m- , -C _t H _2t -COOH, _{-haloC 1-6} alkyl-COOH, - (C _1-6 alkoxy) C _1-6 alkyl-COOH, - C _1-6 alkyl, -OC _1-6 alkyl, -COOH, -C _3-7 cycloalkyl, _{-C m H 2m -COOH, -C m} H 2m -C 3-7 cycloalkyl, -COOH, hydroxy -C _t H _2t -, carboxy-spiro [3.3] heptyl, carboxyphenyl -C _m H _2m - or carboxy pyridinyl -C _m H _2m -, and;

W is -CH ₂ -, -C (C _1-6 alkyl) ₂ -, -O- or carbonyl;

n is 0 or 1;

m is 0 to 7;

t is from 1 to 7;

The invention also relates to the use of compounds of formula I or other compounds of the invention for the manufacture of said compounds, medicaments based on the compounds according to the invention and their production, as well as for the treatment or prevention of HBV infection.

Figure 1 shows the X-ray crystal structure of compound B1.

Justice

The term " C _1-6 alkyl " as used herein refers to saturated straight or branched chain alkyl groups containing from 1 to 6, especially 1 to 4 carbon atoms, such as methyl, ethyl, 1-butyl, 2-butyl, t- butyl and the like. Particular "C _1-6 alkyl" groups are methyl, ethyl, isopropyl, and t- butyl.

The term " -C _m H _2m - ", alone or in combination, signifies a saturated straight-chain or branched-chain alkyl group containing m (m ≠ 0) carbon atoms or bonds (m = 0). In particular, " -C _m H _2m - ", alone or in combination, signifies a saturated straight-chain or branched-chain alkyl group containing from 1 to 4 carbon atoms.

The term " -C _t H _2t - ", alone or in combination, signifies a chemical bond or a saturated straight or branched chain alkyl group containing (t ≠ 0) carbon atoms or bonds (t = 0). In particular, " -C _t H _2t - ", alone or in combination, signifies a saturated straight-chain or branched-chain alkyl group containing from 1 to 4 carbon atoms.

The term "C _1-6 alkoxy", alone or in combination, _signifies a group C _1-6 alkyl-O- (where "C _1-6 alkyl" is defined above), for example methoxy, ethoxy Propoxy, iso-propoxy, n -butoxy, iso-butoxy, 2-butoxy, t -butoxy and the like. Particular "C _1-6 alkoxy" groups are methoxy and ethoxy, more particularly methoxy.

The term " C _3-7 cycloalkyl ", alone or in combination, signifies a saturated carbon ring containing from 3 to 7 carbon atoms, especially 3 to 6 carbon atoms, such as cyclopropyl, cyclobutyl, cyclopentyl, Cyclohexyl, cycloheptyl, and the like. Particular "C _3-7 cycloalkyl" groups are cyclopropyl, cyclopentyl, and cyclohexyl.

The term " carboxy " refers to the group -COOH.

The term " carbonyl ", alone or in combination, refers to the group -C (O) -.

The term " sulfonyl ", alone or in combination, refers to the group -S (O) ₂ -.

The terms " halogen " and " halo " are used interchangeably herein and refer to fluoro, chloro, bromo or iodo.

The term " haloC _1-6 alkyl " refers to an alkyl group in which one or more hydrogen atoms are replaced by the same or different halogen atoms, especially fluoro atoms. Examples of halo C _1-6 alkyl are monofluoro-, difluoro- or trifluoro-methyl, -ethyl or -propyl, such as 3,3,3-trifluoropropyl, 2-fluoro Ethyl, 2,2,2-trifluoroethyl, fluoromethyl, difluoroethyl or trifluoromethyl.

The term "C _1-6 alkoxycarbonyl" refers to a group C _1-6 alkoxy-C (O) -, wherein "C _1-6 alkoxy" is as defined above.

The term "carboxy -C _m H _2m -" is a group "-C _m H _2m -COOH" - refers to a (here, "-C _m H _2m" is as defined above).

The term "C _3-7 cycloalkyl-C _m H _2m -" refers to a "C _3-7 cycloalkyl" group as defined above wherein one of the hydrogen atoms is replaced with a "-C _m H _2m -" group.

The term " enantiomers " refers to two stereoisomers of compounds that are non-overlapping enantiomers of one another.

The term " diastereomer " refers to stereoisomers having two or more chiral centers and wherein the molecules are not mirror images of each other. The diastereomers have different physical properties, such as melting point, boiling point, spectral characteristics and activity.

The compounds according to the invention may exist in the form of their pharmaceutically acceptable salts. The term " pharmaceutically acceptable salts " refers to conventional acid-addition salts which possess the biological effectiveness and properties of the compounds of formula (I) or other compounds of the invention and are formed from suitable non-toxic organic or inorganic acids, Base-addition salts. Acid-addition salts include, for example, those derived from inorganic acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, sulfamic acid, phosphoric acid and nitric acid, and organic acids such as p- toluenesulfonic acid, salicylic acid, , Oxalic acid, succinic acid, citric acid, malic acid, lactic acid, fumaric acid and the like. Base-addition salts include those derived from ammonium, potassium, sodium, and quaternary ammonium hydroxides, such as tetramethylammonium hydroxide. Chemical transformation of a pharmaceutical compound into a salt is a technique well known to pharmaceutical chemists to obtain improved physical and chemical stability, hygroscopicity, flowability and solubility of the compound. For example, in Bastin RJ, et al ., Organic Process Research & Development 2000, 4, 427-435; Or [Ansel, H., et al ., In: Pharmaceutical Dosage Forms and Drug Delivery Systems, 6th ed. (1995), pp. 196 and 1456-1457. Particular is the sodium salt of the compound of formula (I).

The compounds of formula (I) or other compounds of the present invention containing one or more chiral centers may exist as racemates, diastereomeric mixtures, or as optically active single isomers. The racemate can be separated into the enantiomers according to known methods. In particular, diastereoisomeric salts that can be separated by crystallization are formed by reacting a racemic mixture with an optically active acid such as D- or L-tartaric acid, mandelic acid, malic acid, lactic acid or camphorsulfonic acid.

HBV capsid inhibitor

The present invention provides (i) a novel compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,

(I)

In this formula,

R ¹ is hydrogen, halogen or C _1-6 alkyl;

R < ² > is hydrogen or halogen;

R < ³ > is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R ⁵ is hydrogen, hydroxyC _1-6 alkyl, aminocarbonyl, C _1-6 alkoxycarbonyl or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O- or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, C _1-6 alkyl, halo C _1-6 alkyl, C _3-7 cycloalkyl, -C _m H _2m - , -C _1-6 alkoxycarbonyl-C _m H _2m- , -C _t H _2t -COOH, _{-haloC 1-6} alkyl-COOH, - (C _1-6 alkoxy) C _1-6 alkyl-COOH, - C _1-6 alkyl, -OC _1-6 alkyl, -COOH, -C _3-7 cycloalkyl, _{-C m H 2m -COOH, -C m} H 2m -C 3-7 cycloalkyl, -COOH, hydroxy -C _t H _2t -, carboxy-spiro [3.3] heptyl, carboxyphenyl -C _m H _2m - or carboxy pyridinyl -C _m H _2m -, and;

W is -CH ₂ -, -C (C _1-6 alkyl) ₂ -, -O- or carbonyl;

n is 0 or 1;

m is 0 to 7;

t is from 1 to 7;

Another embodiment of the present invention is a compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition: (ii)

R ¹ is hydrogen, chloro, bromo or methyl;

R < ² > is hydrogen or fluoro;

R < ³ > is hydrogen, chloro or fluoro;

R < ⁴ > is methyl, ethyl or propyl;

R < ⁵ > is hydrogen, hydroxymethyl, aminocarbonyl, methoxycarbonyl or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O- or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, difluoro ethyl, isopropyl, isobutyl, t- butyl, cyclopropyl, cyclopropylmethyl, methyl Carboxy (methyl) ethyl, carboxy (gemidemethyl) propyl, carboxy (gemethyl) methyl, carboxy (Methyl) ethyl, carboxy (ethyl) ethyl, carboxy (methoxy) ethyl, carboxycyclobutyl, carboxycyclobutylmethyl, carboxycyclohexyl, carboxycyclohexyl, carboxymethylcyclopropyl, , Carboxycyclobutylmethyl, carboxy spiro [3.3] heptyl, carboxymethoxyethyl, carboxymethoxypropyl, hydroxyethyl, hydroxymethyl (gemidemethyl) butyl, Pyridinyl or Carboxyphenylmethyl;

W is _{-CH 2 -, -C (CH 3} ) 2 -, -O- , or a carbonyl;

n is 0 or 1.

Another embodiment of the present invention is a compound of formula (IA), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (iii)

&Lt; RTI ID = 0.0 &

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R ⁵ is hydrogen, hydroxyC _1-6 alkyl, aminocarbonyl, C _1-6 alkoxycarbonyl or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

Y is -N (R ⁷ ) -, wherein R ⁷ is hydrogen, C _1-6 alkyl, halo C _1-6 alkyl, C _3-7 cycloalkyl-C _m H _2m -, C _1-6 alkoxycarbonyl- _{C m H 2m -, -C t} H 2t -COOH, - halo-C _1-6 alkyl, -COOH, - (C _1-6 alkoxy) C _1-6 alkyl, -COOH, -C _1-6 alkyl, -OC _{1- 6} alkyl, -COOH, -C _3-7 cycloalkyl, _{-C m H 2m -COOH, -C m} H 2m -C 3-7 cycloalkyl, -COOH, hydroxy -C _t H _2t -, carboxy-spiro [3.3] heptyl , carboxyphenyl -C _m H _2m - or carboxy pyridinyl -C _m H _2m -, and;

W is -CH ₂ - or carbonyl, and;

m is 0 to 7;

t is from 1 to 7;

Further embodiments of the invention are: (iv) compounds of formula I or IA, or pharmaceutically acceptable salts, enantiomers or diastereomers thereof, having the following definitions:

R ¹ is chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen, chloro or fluoro;

R &lt; ⁴ &gt; is methyl, ethyl or propyl;

R &lt; ⁵ &gt; is hydrogen, hydroxymethyl, aminocarbonyl, methoxycarbonyl or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

Y is -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, difluoro ethyl, isopropyl, isobutyl, t- butyl, cyclopropyl, cyclopropylmethyl, methyl isopropyl -O- carbonyl, carboxy Carboxy (methyl) ethyl, carboxy difluoroethyl, carboxypropyl, carboxybutyl, carboxy (gemdimethyl) methyl, carboxy (S) selected from the group consisting of ethyl, carboxy (ethyl) ethyl, carboxy (methoxy) ethyl, carboxycyclobutyl, carboxycyclobutylmethyl, carboxycyclohexyl, carboxycyclohexyl, carboxymethylcyclopropyl, carboxycyclobutylmethyl, 3.3] heptyl, carboxymethoxyethyl, carboxymethoxypropyl, hydroxyethyl, hydroxymethyl (gemedimethyl) butyl, hydroxy (gemidemethyl) ethyl, carboxyphenyl, carboxypyridinyl or carboxyphenyl And;

Or a carbonyl - W is -CH _2.

Another embodiment of the present invention is a compound of formula IAA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (v)

(IAA)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen, aminocarbonyl or carboxy;

R &lt; ⁶ &gt; is hydrogen;

R ⁷ is C _1-6 alkyl, halo C _1-6 alkyl, C _3-7 cycloalkyl, C _3-7 cycloalkyl-C _m H _2m -, -C _t H _2t -COOH, -C _m H _2m- C _3-7 cycloalkyl-COOH or carboxyphenyl;

m is 0 to 7;

t is from 1 to 7;

(Vi) a compound of formula (I), (IA) or (IAA), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition:

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen, aminocarbonyl or carboxy;

R &lt; ⁶ &gt; is hydrogen;

R ⁷ is selected from the group consisting of methyl, isopropyl, isobutyl, t-butyl, difluoroethyl, cyclopropyl, cyclopropylmethyl, carboxy (gemidemethyl) ethyl, carboxy (gemidemethyl) propyl, carboxycyclopropylmethyl, Butylmethyl or carboxyphenyl.

Another embodiment of the present invention are: (vii) Compounds of formula IB, or pharmaceutically acceptable salts, enantiomers or diastereomers thereof,

(IB)

In this formula,

R &lt; ¹ &gt; is hydrogen or halogen;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -CH ₂ - or -O-;

W is -CH ₂ -, -C (C _1-6 alkyl) ₂ - or -O-;

n is 0 or 1;

A further embodiment of the present invention is: (viii) a compound of formula I or IB, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition:

R &lt; ¹ &gt; is hydrogen, chloro or bromo;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -CH ₂ - or -O-;

W is _{-CH 2 -, -C (CH 3} ) 2 - or -O-;

n is 0 or 1.

Another embodiment of the present invention is a compound of formula (ID), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (ix)

[Chemical Formula I]

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen, aminocarbonyl or carboxy;

R ⁶ is hydrogen or C _1-6 alkoxycarbonyl and;

X is carbonyl;

Y is -O-, -CH ₂ - or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, C _1-6 alkyl, halo C _1-6 alkyl, C _3-7 cycloalkyl, C _3-7 cycloalkyl Alkyl-C _m H _2m -, -C _t H _2t -COOH -C _m H _2m -C _3-7 cycloalkyl-COOH, hydroxy-C _t H _2t -, carboxy spiro [3.3] heptyl or carboxyphenyl- _m H _2m -;

m is 0 to 7;

t is from 1 to 7;

A further embodiment of the invention are the compounds of formula (I) or (ID), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (x)

R ¹ is chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl, ethyl or propyl;

R &lt; ⁵ &gt; is hydrogen, aminocarbonyl or carboxy;

R &lt; ⁶ &gt; is hydrogen or methyl-O-carbonyl;

X is carbonyl;

Y is -O-, -CH ₂ - or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, isopropyl, difluoro ethyl, isobutyl, t- butyl, cyclopropyl, cyclopropylmethyl, carboxy (Gemdimethyl) ethyl, carboxy (methyl) ethyl, carboxycyclopropylmethyl, carboxyphenyl, carboxycyclopentyl, carboxycyclohexyl, carboxy Carboxy spiro [3.3] heptyl, hydroxyethyl, hydroxy (gemedimethyl) ethyl or carboxyphenylmethyl.

Another embodiment of the present invention is (xi) a compound of formula IE, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein:

(IE)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or a carboxy -C _m H _2m -, and;

Y is -O-, -CH ₂ - or -N (R ⁷ ) -, wherein R ⁷ is C _1-6 alkyl, C _3-7 cycloalkyl, -C _t H _2t -COOH, -C _3-7 cyclo alkyl, _{-C m H 2m -COOH, -C m} H 2m -C 3-7 cycloalkyl, -COOH, - (C _1-6 alkoxy) C _1-6 alkyl, -COOH, -C _1-6 alkyl, -OC _{1- 6} alkyl, -COOH, carboxy-spiro [3.3] heptyl or carboxyphenyl -C _m H _2m -, and;

W is -CH ₂ - or -C (C _1-6 alkyl) ₂ -;

m is 0 to 7;

t is from 1 to 7;

A further embodiment of the present invention is (xii) a compound of formula I or IE, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition:

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -O-, -CH ₂ - or -N (R ⁷⁾ - provided that, R ⁷ is isopropyl, methyl, isobutyl, t- butyl, cyclopropyl, ethyl carboxy, propyl carboxy, carboxy-butyl, carboxy (Gem (Dimethylamino) methyl, carboxy (gemidemethyl) ethyl, carboxy (methyl) ethyl, carboxycyclobutyl, carboxycyclopentyl, carboxycyclohexyl, carboxymethylcyclopropyl, carboxy (Ethyl) ethyl, carboxy (methoxy) ethyl, carboxycyclobutylmethyl, carboxy spiro [3.3] heptyl, carboxymethoxyethyl, carboxymethoxypropyl, carboxyphenylmethyl or carboxyphenyl;

W is -CH ₂ - or -C (CH ₃ ) ₂ -.

Another embodiment of the present invention is (xiii) a compound of formula IE: or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein:

(IE)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or a carboxy -C _m H _2m -, and;

Y is -N (R ⁷ ) -, wherein R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl, -C _t H _2t -COOH, -C _m H _2m -C _3-7 cycloalkyl- COOH or carboxyphenyl;

W is -CH ₂ - and;

m is 0 to 7;

t is from 1 to 7;

A further embodiment of the present invention is a compound of formula I or IE, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (xiv)

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, t- butyl, cyclopropyl, carboxy (gem-dimethyl) ethyl, carboxy (gem-dimethyl) propyl, carboxy (methyl) ethyl, carboxy-cyclopropyl Methyl, carboxycyclopentyl, carboxycyclohexyl, carboxycyclobutylmethyl or carboxyphenyl;

W is -CH ₂ - is.

Another embodiment of the invention are the compounds of formula I, IA, IAA, IB, ID or IE, or pharmaceutically acceptable salts, enantiomers or diastereoisomers thereof,

The 2-thiazolyl group is further substituted by C _1-6 alkyl;

All other substituents are defined as above.

A further embodiment of the present invention is a compound of formula (I), (IA), (IA), (IB), (ID) IA or IB, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,

The 2-thiazolyl group is further substituted with methyl;

All other substituents are defined as above.

Another embodiment of the present invention is a compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (xvii)

(I)

In this formula,

R ¹ is hydrogen, halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O- or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl, C _1-6 alkoxycarbonyl -C _m H _2m -, -C _m H _2m -COOH, - (C _1-6 alkoxy) C _1-6 alkyl-COOH, -C _1-6 alkyl-OC _1-6 alkyl-COOH, -C _3-7 cycloalkyl-C _m H _2m -COOH, -C _m H _2m -C _3-7 cycloalkyl-COOH, hydroxy-C _m H _2m -, carboxy spiro [3.3] heptyl or carboxyphenyl-C _m H _2m -;

W is -CH ₂ -, -C (C _1-6 alkyl) ₂ -, -O- or carbonyl;

n is 0 or 1;

m is 0 to 7;

A further embodiment of the invention are the compounds of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (xviii)

R ¹ is hydrogen, chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen, chloro or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O- or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, isopropyl, t- butyl, cyclopropyl, methyl-carbonyl -O- isopropyl, carboxyethyl, carboxy Carboxy (methyl) ethyl, carboxy (ethyl) ethyl, carboxy (dimethylamino) ethyl, carboxy (gemidemethyl) (Methoxy) ethyl, carboxycyclobutyl, carboxycyclobutylmethyl, carboxycyclopentyl, carboxycyclohexyl, carboxymethylcyclopropyl, carboxycyclopropylmethyl, carboxycyclobutylmethyl, carboxy spiro [3.3] heptyl, carboxymethoxyethyl, Carboxymethoxypropyl, hydroxyethyl, hydroxymethyl (gemedimethyl) butyl, carboxyphenyl or carboxyphenylmethyl;

W is _{-CH 2 -, -C (CH 3} ) 2 -, -O- , or a carbonyl;

n is 0 or 1.

Another embodiment of the present invention is a compound of formula (IA), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,

&Lt; RTI ID = 0.0 &

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

Y is -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl, C _1-6 alkoxycarbonyl _{-C m H 2m -, -C m} H 2m -COOH , - (C _1-6 alkoxy) C _1-6 alkyl-COOH, -C _1-6 alkyl-OC _1-6 alkyl-COOH, -C _3-7 cycloalkyl-C _m H _2m -COOH, -C _m H _2m -C _3-7 cycloalkyl-COOH, hydroxy-C _m H _2m -, carboxy spiro [3.3] heptyl or carboxyphenyl-C _m H _2m -;

W is -CH ₂ - or carbonyl, and;

m is 0 to 7;

A further embodiment of the present invention is a compound of formula IA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein (xx)

R ¹ is chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen, chloro or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

Y is -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, isopropyl, t- butyl, cyclopropyl, methyl-carbonyl -O- isopropyl, carboxy-ethyl, carboxy-propyl, carboxy-butyl, carboxy (gem dimethyl Carboxy (methyl) methyl, carboxy (gemidemethyl) ethyl, carboxy (gemidemethyl) propyl, carboxy , Carboxycyclobutylmethyl, carboxycyclopentyl, carboxycyclohexyl, carboxymethylcyclopropyl, carboxycyclopropylmethyl, carboxycyclobutylmethyl, carboxy spiro [3.3] heptyl, carboxymethoxyethyl, carboxymethoxypropyl, hydroxyethyl, Butyl, hydroxymethyl (gemdimethyl) butyl, carboxyphenyl or carboxyphenylmethyl;

Or a carbonyl - W is -CH _2.

Another embodiment of the present invention is (xxi) a compound of formula IAA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein:

(IAA)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen;

R ⁷ is C _1-6 alkyl, C _3-7 cycloalkyl, -C _m H _2m -COOH, -C _m H _2m -C _3-7 cycloalkyl-COOH or carboxyphenyl;

m is 1 to 6;

A further embodiment of the invention is a compound of formula IAA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxii):

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen;

R ⁷ is methyl, isopropyl, t-butyl, cyclopropyl, carboxy (gemethyl) ethyl, carboxy (gemidemethyl) propyl, carboxycyclopropylmethyl, carboxycyclobutylmethyl or carboxyphenyl.

Another embodiment of the invention are the compounds of formula (Ic), (xxiii), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:

&Lt; EMI ID =

In this formula,

R &lt; ¹ &gt; is halogen;

R ² is hydrogen;

R &lt; ³ &gt; is halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen;

R &lt; ⁶ &gt; is hydrogen;

R &lt; ⁷ &gt; is hydrogen;

W is -CH ₂ - is.

Another embodiment of the present invention is a compound of formula ID: (xxiv), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,

[Chemical Formula I]

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or C _1-6 alkoxycarbonyl and;

X is carbonyl;

Y is -O- or -N (R ⁷ ) -, wherein R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl, -C _m H _2m -COOH, -C _m H _2m- C _{3- 7} cycloalkyl, -COOH, hydroxy -C _m H _2m -, carboxy-spiro [3.3] heptyl or carboxyphenyl -C _t H _2t -, and;

m is 1 to 6;

t is from 0 to 6;

A further embodiment of the present invention is a compound of formula ID, (xxv), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition:

R ¹ is chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or methyl-O-carbonyl;

X is carbonyl;

Y is -O- or -N (R ⁷⁾ - provided that, R ⁷ is hydrogen, methyl, isopropyl, t- butyl, cyclopropyl, carboxy (gem-dimethyl) ethyl, carboxy (methyl) ethyl, carboxy-methyl-cyclopropyl, Carboxycyclohexyl, carboxy (gemidemethyl) propyl, carboxy (gemedimethyl) butyl, carboxycyclobutylmethyl, carboxy spiro [3.3] heptyl, hydroxyethyl or carboxyphenylmethyl.

Another embodiment of the present invention is a compound of formula (IE), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein (xxvi)

(IE)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or a carboxy -C _m H _2m -, and;

Y is -O- or -N (R ⁷ ) -, wherein R ⁷ is C _1-6 alkyl, C _3-7 cycloalkyl, -C _m H _2m -COOH, -C _3-7 cycloalkyl-C _m H _{2m -COOH, -C m H 2m -C} 3-7 cycloalkyl, -COOH, - (C _1-6 alkoxy) C _1-6 alkyl, -COOH, -C _1-6 alkyl, -OC _1-6 alkyl, -COOH, carboxy-spiro [3.3] heptyl or carboxyphenyl -C _m H _2m -, and;

W is -CH ₂ - or -C (C _1-6 alkyl) ₂ -;

m is 0 to 6;

A further embodiment of the present invention is a compound of formula IE, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxvii):

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -O- or -N (R ⁷⁾ - provided that, R ⁷ is isopropyl, methyl, t- butyl, cyclopropyl, ethyl carboxy, propyl carboxy, carboxy-butyl, carboxy (gem dimethyl) methyl, carboxy (Gem Carboxy (methyl) ethyl, carboxy (methyl) ethyl, carboxycyclobutyl, carboxycyclopropylmethyl, carboxycyclopentyl, carboxycyclohexyl, carboxymethylcyclopropyl, carboxy Carboxypropylmethyl, carboxypropylmethyl, carboxymethylmethyl, carboxymethylmethyl, carboxymethylmethyl, carboxymethylmethyl, carboxymethylmethyl, carboxymethylmethyl,

W is -CH ₂ - or -C (CH ₃ ) ₂ -.

Another embodiment of the invention are the compounds of formula (IE), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, of formula (xxviii)

(IE)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or a carboxy -C _m H _2m -, and;

Y is -O-, -CH ₂ - or -N (R ⁷⁾ - provided that, R ⁷ is C _1-6 alkyl, C _{3-7 cycloalkyl, -C m H 2m -COOH, -C} 3-7 cycloalkyl alkyl, _{-C m H 2m -COOH, -C m} H 2m -C 3-7 cycloalkyl, -COOH, carboxy-spiro [3.3] heptyl, - (C _1-6 alkoxy) C _1-6 alkyl, -COOH, -C _{1 -6} alkyl, -OC _1-6 alkyl, -COOH, carboxy-pyridinyl, -C _m H _2m - or carboxyphenyl -C _m H _2m -, and;

W is -CH ₂ - or -C (C _1-6 alkyl) ₂ -;

m is 0 to 6;

A further embodiment of the present invention is a compound of formula IE, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxix):

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -O-, -CH ₂ - or -N (R ⁷⁾ - provided that, R ⁷ is methyl, t- butyl, isopropyl, cyclopropyl, ethyl carboxy, propyl carboxy, carboxy-butyl, carboxy (gem dimethyl) Carboxy (methyl) ethyl, carboxy (methyl) ethyl, carboxycyclobutyl, carboxycyclohexyl, carboxycyclohexyl, carboxycyclopropylmethyl, Is selected from the group consisting of (ethyl) ethyl, carboxy (methoxy) ethyl, carboxycyclobutylmethyl, carboxymethylcyclopropyl, carboxy spiro [3.3] heptyl, carboxymethoxyethyl, carboxymethoxypropyl, carboxyphenylmethyl, carboxypyridinyl or carboxyphenyl ;

W is -CH ₂ - or -C (CH ₃ ) ₂ -.

The present invention provides (xxx) a novel compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:

(I)

In this formula,

R ¹ is hydrogen, halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O-, -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl or C _1-6 alkoxycarbonyl-C _m H _2m -

R ⁸ is -C _m H _2m -, -C _t H _2t -C _3-7 cycloalkyl-C _t H _2t - or phenyl;

W is -CH ₂ -, -O-, or a carbonyl;

n is 0 or 1;

m is 1 to 6;

t is from 0 to 6;

A further embodiment of the invention are the compounds of formula (I), or pharmaceutically acceptable salts, enantiomers or diastereoisomers thereof, wherein: (xxxi)

R ¹ is hydrogen, chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O-, -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, isopropyl, cyclopropyl or methyl-O-carbonylisopropyl,

R ⁸ is ethyl, propyl, (gemidemethyl) methyl, (gemidemethyl) ethyl, (methyl) ethyl, cyclobutyl, cyclopentyl, cyclohexyl, methylcyclopropyl, cyclopropylmethyl, cyclobutylmethyl or phenyl;

W is -CH ₂ -, -O-, or a carbonyl;

n is 0 or 1.

Another embodiment of the present invention is a compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxxii):

R ¹ is hydrogen, halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O-, -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl or C _1-6 alkoxycarbonyl-C _m H _2m -

R ⁸ is -C _m H _2m -, C _3-7 cycloalkyl-C _t H _2t - or phenyl;

W is -CH ₂ -, -O-, or a carbonyl;

n is 0 or 1;

m is from 1 to 6;

t is from 0 to 6;

A further embodiment of the present invention is a compound of formula (I), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxxiii):

R ¹ is hydrogen, chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

X is carbonyl or sulfonyl;

Y is -CH ₂ -, -O-, -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, isopropyl, cyclopropyl or methyl-O-carbonylisopropyl,

R ⁸ is (gemedimethyl) methyl, (gemidemethyl) ethyl, (methyl) ethyl, cyclobutyl, cyclopropylmethyl or phenyl;

W is -CH ₂ -, -O-, or a carbonyl;

n is 0 or 1.

Another embodiment of the present invention is (xxxiv) a compound of formula (IA), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:

&Lt; RTI ID = 0.0 &

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

Y is -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, C _1-6 alkyl, C _3-7 cycloalkyl or C _1-6 alkoxycarbonyl-C _m H _2m -

R ⁸ is -C _m H _2m -, C _3-7 cycloalkyl-C _t H _2t - or phenyl;

W is -CH ₂ - or carbonyl, and;

m is 1 to 6;

t is from 0 to 6;

A further embodiment of the present invention is a compound of formula IA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxxv):

R ¹ is chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

Y is -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, isopropyl, cyclopropyl or methyl-O-carbonylisopropyl,

R ⁸ is (gemedimethyl) methyl, (gemidemethyl) ethyl, (methyl) ethyl, cyclobutyl, cyclopropylmethyl or phenyl;

Or a carbonyl - W is -CH _2.

Another embodiment of the present invention is a compound of formula (IAB), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (xxxvi)

(IAB)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen;

R &lt; ⁶ &gt; is hydrogen;

R ⁸ is -C _m H _2m -, C _3-7 cycloalkyl-C _m H _2m - or phenyl;

m is 1 to 6;

A further embodiment of the present invention is a compound of formula (IAB), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition (xxxvii):

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen;

R &lt; ⁶ &gt; is hydrogen;

R ⁸ is (gemidemethyl) ethyl, cyclopropylmethyl or phenyl.

Another embodiment of the present invention is a compound of formula ID: (xxxviii), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,

[Chemical Formula I]

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen, C _1-6 alkoxycarbonyl or carboxy-C _m H _2m -;

X is carbonyl or sulfonyl;

Y is -O-, -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen, C _1-6 alkyl or C _3-7 cycloalkyl,

R ⁸ is -C _m H _2m -, C _3-7 cycloalkyl-C _t H _2t - or phenyl;

m is 1 to 6;

t is from 0 to 6;

A further embodiment of the present invention is a compound of formula ID having the following definition (xxxix), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:

R ¹ is chloro, bromo or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R <^6> is hydrogen, methyl-O-carbonyl or carboxymethyl;

X is carbonyl or sulfonyl;

Y is -O-, -NR ⁷ or -NR ⁸ -COOH,

R &lt; ⁷ &gt; is hydrogen, isopropyl or cyclopropyl,

R ⁸ is (gemidemethyl) ethyl, (methyl) ethyl, cyclobutyl, cyclopropylmethyl or phenyl.

Another embodiment of the present invention is a compound of formula (IF), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (x1)

(Formula IF)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or a carboxy -C _m H _2m -, and;

Y is -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is C _1-6 alkyl or C _3-7 cycloalkyl,

R ⁸ is -C _m H _2m -, C _3-7 cycloalkyl-C _t H _2t - or phenyl;

m is 1 to 6;

t is from 0 to 6;

A further embodiment of the present invention is a compound of formula IF, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein (xli)

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -NR ⁷ or -NR ⁸ -COOH,

R &lt; ⁷ &gt; is isopropyl or cyclopropyl,

R ⁸ is (gemedimethyl) methyl, (gemidemethyl) ethyl, (methyl) ethyl, cyclobutyl, cyclopropylmethyl or phenyl.

Another embodiment of the present invention is a compound of formula (IF), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, wherein: (xlii)

(Formula IF)

In this formula,

R ¹ is halogen or C _1-6 alkyl;

R &lt; ² &gt; is hydrogen or halogen;

R &lt; ³ &gt; is hydrogen or halogen;

R ⁴ is C _1-6 alkyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R ⁶ is hydrogen or a carboxy -C _m H _2m -, and;

Y is -NR ⁷ or -NR ⁸ -COOH,

R ⁷ is hydrogen or C _3-7 cycloalkyl,

R ⁸ is -C _m H _2m -, C _3-7 cycloalkyl-C _m H _2m - or phenyl;

m is 1 to 6;

A further embodiment of the present invention is a compound of formula IE, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof, having the following definition of (xliii)

R ¹ is chloro or methyl;

R &lt; ² &gt; is hydrogen or fluoro;

R &lt; ³ &gt; is hydrogen or fluoro;

R &lt; ⁴ &gt; is methyl or ethyl;

R &lt; ⁵ &gt; is hydrogen or carboxy;

R &lt; ⁶ &gt; is hydrogen or carboxymethyl;

Y is -NR ⁷ or -NR ⁸ -COOH,

R &lt; ⁷ &gt; is hydrogen or cyclopropyl,

R ⁸ is (gemidemethyl) ethyl, (methyl) ethyl, cyclopropylmethyl or phenyl.

A further embodiment of the present invention is a compound of formula I, IA, IAA, IB, IC, ID, IE, IAB, wherein the chirality at the 4 position of the (xliv) dihydropyrimidine core is the same as IR, Or a compound of formula IF, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:

(I)

(IR)

In this formula,

R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , X, Y, W and n are as defined in any of the embodiments (i) to (xliii).

Particular compounds of the invention according to the present invention are the following compounds, or pharmaceutically acceptable salts, enantiomers or diastereomers thereof:

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(6-oxo-1,3,4,8,9,9a-hexahydropyrazino [ ] [1,3] oxazin-2-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate;

(4-fluoro-phenyl) -6 - [(4-oxo-6,7,9,9a-tetrahydro-1H-pyrazino [ [1,4] oxazin-8-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate;

Methyl] -4-methyl-4H-pyrrolo [2,3-c] pyridazin- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl] methyl] -4- (4-trifluoromethyl-pyrimidin-4-yl) (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl] methyl] -4 (4H) -6- [[(8aS) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl] methyl] -4 (4H) -6- [[(8aR) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl] methyl] -4 (4H) -6- [[(8aR) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-bromo-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl] methyl] -4 (4H) -6- [[(8aR) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-bromo-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl] methyl] -4 &lt; RTI ID = 0.0 &gt; - (3,4-difluorophenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Chloro-3-fluoro-phenyl) -6 - [(6-oxo-3,4,7,8,9,9a-hexahydro-lH-pyrido [ 2-a] pyrazin-2-yl) methyl] -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Methyl (4R) -6 - [[(8aR) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Methyl (4R) -6 - [[(8aS) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Ethyl] (4R) -6 - [[(8aS) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-bromo-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

(4R) -6 - [[(8aR) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-bromo-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl) methyl] -4- (4-methylpiperazin-1-yl) (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Yl) methyl] -4- (4-methylpiperazin-1-yl) (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Methyl (4R) -6 - [[(3aS) -1,1-dioxo-2,3,3a, 4,6,7- hexahydro- [1,2,5] thiadiazolo [ a] pyrazin-5-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Methyl (4R) -6 - [[(3aR) -1,1-dioxo-2,3,3a, 4,6,7- hexahydro- [1,2,5] thiadiazolo [ a] pyrazin-5-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

3 - [(8aS) -7 - [[(4R) -4- (2-Chlorophenyl) -5- ethoxycarbonyl-2-thiazol-2-yl-1,4- dihydropyrimidine- -Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] -2-methyl-propanoic acid;

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- mountain;

Methyl-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2-dimethyl-propanoic acid;

(2-chloro-3-fluoro-phenyl) -6- [[2- (2-methoxy- 5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-7-yl] methyl] -2- thiazol- - carboxylate;

Methyl 7 - [[(4R) -4- (2-chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- -Yl] methyl] -3-oxo-2,5,6,8-tetrahydro-1H-imidazo [1,5-a] pyrazine-8a-carboxylate;

(R) -6- [(S) -2- (4-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

(R) -6- [(S) -2- (4-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(R) -6- [(S) -2- (3-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(2-carboxy-phenyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin-7-ylmethyl] -4- (2- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(R) -6- [(S) -2- (3-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

2- [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Dihydropyrimidin-6-yl] methyl] -2-cyclopropyl-3-oxo-1,5,6,8-tetrahydroimidazo [1,5-a] pyrazin-8-yl] acetic acid;

2- [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Dihydropyrimidin-6-yl] methyl] -2-isopropyl-3-oxo-1,5,6,8-tetrahydroimidazo [1,5-a] pyrazin-8-yl] acetic acid;

Methyl-ethyl) -3-oxo-hexahydro-imidazo [1,5-a] pyrazin-7-ylmethyl] -4 - (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carbonic acid;

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carbonic acid;

1 - [[(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid ;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4 -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid ;

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro- Methyl-butanoic acid;

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-benzothiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopropanecarboxylic acid;

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1, 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] cyclobutanecarboxylic acid;

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] cyclobutanecarboxylic acid;

3-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2-dimethyl-propanoic acid;

3 - [(8aS) -7 - [[(4S) -4- (3-fluoro- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

Phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-l, 4-dihydropyrimidin-6- Yl] methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

2 - [(4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Acetic acid;

2 - [(4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Acetic acid;

2- [l- [(8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Acetic acid;

(2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid;

(2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid;

(2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid;

(2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] butanoic acid;

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid;

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid;

(2-carboxy-ethyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin-7-ylmethyl] -4- (2- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

Methyl-ethyl) -3-oxo-hexahydro-imidazo [1,5-a] pyrazin-7-yl Methyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

Methyl-ethyl) -3-oxo-hexahydro-imidazo [1,5-a] pyrazin-7-yl Methyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(R) -6 - [(S) -2- (1-carboxy-cyclobutylmethyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin- 2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

Yl) methyl] -4 - ((R) - (S) -2- (1-carboxy-cyclobutylmethyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- 2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(S) -2 - ((1R, 3S) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- ] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

(S) -2 - ((R) - (S) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Ylmethyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(S) -2 - ((1R, 3R) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [l, 5- a] pyrazin- ] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

(S) -2 - ((1R, 3R) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [l, 5- a] pyrazin- ] -4- (2-Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

Ylmethyl] -4- (2-chloro-4- (4-fluoro-benzyl) -imidazo [1,5- a] pyrazin- Fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

Ylmethyl] -4- (2-chloro-3- (4-fluorobenzyl) -3-oxo-hexahydro- Fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

2- [7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] ethoxy] acetic acid;

2 - [(4R) -4- (2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] propoxy] acetic acid;

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6- [ 8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-7-yl] methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate;

Chloro-3-fluoro-phenyl) -6 - [[2- (2-hydroxyethyl) -Imidazo [1,5-a] pyrazin-7-yl] methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate;

Chloro-3-fluoro-phenyl) -6 - [[2- (2-hydroxyethyl) -Imidazo [1,5-a] pyrazin-7-yl] methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate;

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] cyclohexanecarboxylic acid;

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] cyclohexanecarboxylic acid;

3 - [(8aS) -7 - [[(4R) -4- (2-Chlorophenyl) -5-methoxycarbonyl-2-thiazol- -Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid;

2 - [[(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] methyl] butanoic acid;

(3-fluoro-2-methyl-phenyl) -2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

Yl] -1,4-dihydropyrimidin-6-yl] methyl] -1H-pyrazolo [3,4-d] pyrimidin- ] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid;

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Propanoic acid;

2- [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] spiro [3.3] heptane- 6-carboxylic acid;

5 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] pentanoic acid;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4 Yl] methyl] cyclobutanecarboxylic acid &lt; / RTI &gt; &lt; RTI ID = 0.0 &;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8R, 8aS) -2-Cyclopropyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(8S, 8aR) -2-Cyclopropyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8R, 8aS) -7 - [[(4S) -4- (3,4-Difluoro-2-methyl-phenyl) -5-methoxycarbonyl- Yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(8S, 8aR) -7 - [[(4S) -4- (3,4-Difluoro- Yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl (2S, -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8R, 8aS) -2-t-Butyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5- methoxycarbonyl- Yl] -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carboxylic acid;

(8S, 8aR) -2-t-Butyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carboxylic acid;

Methyl (8aS) -7 - [[(4R) -4- (2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Pyrimidin-6-yl] methyl] -3-oxo-2,5,6,8-tetrahydro-1H-imidazo [1,5-a] pyrazine-8a-carboxylate;

2- [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- 6-yl] methyl] -1,1-dimethyl-3-oxo-6,8-dihydro-5H-oxazolo [3,4-a] pyrazin-8-yl] acetic acid;

2 - [(8aR) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- 6-yl] methyl] -1,1-dimethyl-3-oxo-6,8-dihydro-5H-oxazolo [3,4-a] pyrazin-8-yl] acetic acid;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2-methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Methyl] -2-methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

Methyl (4R) -6 - [[(8R, 8aS) -2-t- butyl-8-carbamoyl-3-oxo-5,6,8,8a-tetrahydro- a] pyrazin-7-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Methyl (4R) -6 - [[(8S, 8aR) -2-t-butyl-8-carbamoyl-3-oxo-5,6,8,8a-tetrahydro- a] pyrazin-7-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

3-fluoro-phenyl) -5-propoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

Chloro-4-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid;

5- [7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] pyridine-2-carboxylic acid;

(S) -6- [(S) -2- (2-carboxy-2,2-difluoro-ethyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Methyl] -4- (3,4-difluoro-2-methyl-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Methyl] -2- (cyclopropylmethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2- (cyclopropylmethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(3-fluoro-phenyl) -5-ethoxycarbonyl-2- (4-methylthiazol-2-yl) -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2,2-dimethyl-propanoic acid;

2 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol- Yl] methyl] -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [1,2-a] pyrazine-1-carboxylic acid;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -2-isobutyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -2-isobutyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8R, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-oxazolo [3,4-a] pyrazine-8-carboxylic acid;

(8S, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-oxazolo [3,4-a] pyrazine-8-carboxylic acid;

Ethyl (4R) -6 - [[(8R, 8aS) -2-t-butyl-8- (hydroxymethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ , 5- a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- Rate;

Ethyl (4R) -6 - [[(8S, 8aR) -2-t-butyl-8- (hydroxymethyl) -3-oxo-5,6,8,8a-tetrahydro- , 5- a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- Rate;

(4R) -6- [[(8aR) -2-Isopropyl-3-oxo-5,6,8,8a-tetrahydro- 1 H- imidazo [1,5- a] pyrazin- Methyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

(4R) -6- [[(8aS) -2-Isopropyl-3-oxo-5,6,8,8a-tetrahydro- IH- imidazo [1,5- a] pyrazin- Methyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Yl] methyl] -2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ Pyrazine-8-carboxylic acid;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Yl] methyl] -2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ Pyrazine-8-carboxylic acid;

Methyl-propyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1, 5-a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- ; or

Methyl-propyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [l, 5-a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- .

More particular compounds of the present invention are the following compounds, or pharmaceutically acceptable salts, enantiomers or diastereomers thereof:

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

Methyl-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2-dimethyl-propanoic acid;

(R) -6- [(S) -2- (4-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

(R) -6- [(S) -2- (4-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(R) -6- [(S) -2- (3-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(R) -6- [(S) -2- (3-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carbonic acid;

1 - [[(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid ;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4 -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid ;

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-benzothiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopropanecarboxylic acid;

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2-dimethyl-propanoic acid;

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid;

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid;

(R) -6 - [(S) -2- (1-carboxy-cyclobutylmethyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin- 2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester;

Yl) methyl] -4 - ((R) - (S) -2- (1-carboxy-cyclobutylmethyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- 2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester;

(3-fluoro-2-methyl-phenyl) -2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8S, 8aR) -2-Cyclopropyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8S, 8aR) -7 - [[(4S) -4- (3,4-Difluoro- Yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl (2S, -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

(8S, 8aR) -2-t-Butyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carboxylic acid;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Methyl] -2-methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid;

Methyl (4R) -6 - [[(8R, 8aS) -2-t- butyl-8-carbamoyl-3-oxo-5,6,8,8a-tetrahydro- a] pyrazin-7-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Methyl (4R) -6 - [[(8S, 8aR) -2-t-butyl-8-carbamoyl-3-oxo-5,6,8,8a-tetrahydro- a] pyrazin-7-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate;

Chloro-4-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Methyl] -2- (cyclopropylmethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2- (cyclopropylmethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ;

2 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol- Yl] methyl] -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [1,2-a] pyrazine-1-carboxylic acid;

(8R, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-oxazolo [3,4-a] pyrazine-8-carboxylic acid;

(8S, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-oxazolo [3,4-a] pyrazine-8-carboxylic acid;

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Yl] methyl] -2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ Pyrazine-8-carboxylic acid; or

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Yl] methyl] -2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ Pyrazine-8-carboxylic acid.

synthesis

The compounds of the present invention may be prepared by any conventional means. Suitable methods for synthesizing such compounds as well as their starting materials are provided in the following Schemes and Examples. All substituents, in particular R ¹ to R ⁶ , X, Y, W and n are as defined above, unless otherwise indicated. Also, unless otherwise indicated, all reactions, reaction conditions, abbreviations, and symbols have well-known meaning to those skilled in the art of organic chemistry.

The general synthetic route for compound Ia (Scheme 1)

[Reaction Scheme 1]

The compound of interest Ia may be prepared according to scheme 1 above. The one-port reaction is carried out between acetyl acetate II , benzaldehyde III and thiazolamidine IV to give the dihydropyrimidine V. Subsequently, the compound V is subjected to SFC chiral separation to give the (-) - enantiomer Va , and its stereochemistry is compared with that of one of its specific compounds B1 whose stereochemistry is determined by X-ray diffraction study (Fig. 1). Compound Va is brominated to give compound VI . Compound VI is coupled with a suitably fused amine VII to yield the compound of interest Ia .

Can be prepared by condensing and cyclizing the dihydropyrimidine V in the order of acetyl acetate II , aldehyde III and thiazolamidine IV . The reaction can be carried out in a suitable alcoholic solvent such as trifluoroethanol under heating conditions over several hours in the presence of a base such as potassium acetate.

Compound V is SFC chiral cleaved to give (-) - enantiomer Va .

Compound Va may be reacted with a brominating agent such as N -bromosuccinimide in a suitable inert solvent such as carbon tetrachloride at 80-100 ° C to prepare bromide VI .

Bromide VI can be coupled with the fused amine VII to give the compound of interest Ia . The reaction is typically carried out at room temperature over several hours in the presence of an organic base such as N , N -diisopropylethylamine in a suitable solvent such as 1,2-dichloroethane.

The general synthetic route to diastereomeric mixtures of compounds I (Scheme 1-1)

[Reaction Scheme 1-1]

The compound of interest I can be prepared analogously to the compound of interest Ia without SFC chiral separation of the dihydropyrimidine V. [

In Scheme 1 or Scheme 1-1, the 2-thiazolyl group of the compounds of formula Ia, V, Va, Vb, VI, VI-1, I and any other compound of the present invention is optionally substituted with C _1-6 alkyl, .

The present invention also relates to a process for preparing a compound of formula (I) or another compound of the invention, which process comprises the steps of: (a) reacting a compound of formula (VI-1)

[Formula VI-1]

(VII)

In this formula,

R ¹ to R ⁶ , X, Y, W and n are as defined above unless otherwise indicated.

In step (a), the base may be, for example, N , N -diisopropylethylamine.

Also, the compounds of formula (I) or other compounds of the present invention prepared according to the above method are an object of the present invention.

Pharmaceutical compositions and administration

The invention also relates to compounds of formula (I) or other compounds of the invention for use as therapeutically active substances.

Yet another embodiment provides a method of using the compounds of the invention for the manufacture of a pharmaceutical composition or medicament containing the compounds of the invention and a therapeutically inert carrier, diluent or excipient, as well as the compositions and medicaments. In one example, the compounds of formula (I) or other compounds of the present invention are administered at a suitable pH and at the desired purity at ambient temperature to a physiologically acceptable carrier, i. E. And may be formulated by mixing with a carrier. The pH of the formulation depends primarily on the particular application and concentration of the compound, but is preferably in the range of from about 3 to about 8. In one example, compounds of formula I or other compounds of the invention are formulated in acetate buffer (pH 5). In another embodiment, the compounds of formula I and other compounds of the invention are sterile. The compound can be stored, for example, as a solid or as an amorphous composition, as a lyophilized formulation, or as an aqueous solution.

The compositions are formulated, dosed and administered in a manner consistent with good medical practice. Factors related to this include the particular disease to be treated, the particular human being to be treated, the clinical condition of the individual patient, the cause of the disease, the delivery site of the agent, the method of administration, the schedule of administration, and other factors known to the physician. The " effective amount " of the compound to be administered will be appreciated by the above considerations and will be necessary for the inhibition of serum HBV DNA levels, HBeAg serum conversion to HBeAb, or HBeAg loss, or normalization and improvement of alanine aminotransferase levels in liver histology It is the minimum amount. For example, the amount may be less than the amount that is toxic to normal cells, or to humans as a whole.

In one example, the pharmacologically effective amount of a compound of the invention administered parenterally per dose is from about 0.01 to 100 mg / kg body weight per day, alternatively from about 0.1 to 20 mg / patient body weight per day, Gt; mg / kg / day &lt; / RTI &gt; In another embodiment, oral dosage unit forms, such as tablets and capsules, contain from about 0.1 to about 1000 mg of a compound of the invention.

The compounds of the present invention may be administered by any suitable means including, but not limited to, oral, topical (including buccal and sublingual), rectal, vaginal, transdermal, parenteral, subcutaneous, intraperitoneal, intrapulmonary, , &Lt; / RTI &gt; and intranasally, and, if desired, can be administered in lesions for topical treatment. Parenteral infusions include intramuscular, intravenous, intraarterial, intraperitoneal or subcutaneous administration.

The compounds of the present invention may be administered in any conventional dosage form such as tablets, powders, capsules, solutions, dispersions, suspensions, syrups, sprays, suppositories, gels, emulsions, patches and the like. The composition may contain conventional constituents in pharmaceutical preparations such as diluents, carriers, pH adjusting agents, sweeteners, extenders and additional active agents.

Typical formulations are prepared by admixing the compound of the present invention and a carrier or excipient. Suitable carriers and excipients are well known to those skilled in the art and are described, for example, in Ansel, Howard C., et al., Ansel ' s Pharmaceutical Dosage Forms and Drug Delivery Systems. Philadelphia: Lippincott, Williams & Wilkins, 2004]; [Gennaro, Alfonso R., et al., Remington: The Science and Practice of Pharmacy. Philadelphia: Lippincott, Williams & Wilkins, 2000]; And Rowe, Raymond C. Handbook of Pharmaceutical excipients. Chicago, Pharmaceutical Press, 2005]. Formulations may also contain one or more buffers, stabilizers, surfactants, wetting agents, lubricants, emulsifiers, suspending agents, preservatives, antioxidants, opacifiers, bowels, processing aids, colorants, sweeteners, fragrances, flavors, (I. E., A compound of the invention or a pharmaceutical composition thereof), or other excipients to assist in the production of the pharmaceutical product (i. E., Pharmaceutical).

Examples of suitable oral dosage forms include about 30 mg to 90 mg anhydrous lactose, about 5 mg to 40 mg sodium croscarmellose, about 5 mg to 30 mg polyvinylpyrrolidone (PVP) K30, and about 1 mg To about 10 mg of magnesium stearate together with about 0.1 mg to 1000 mg of the compound of the present invention. The powdered ingredients are first mixed together and then mixed with a solution of PVP. The resulting composition is dried, granulated and mixed with magnesium stearate and compressed into tablets using conventional equipment. Examples of aerosol formulations include, for example, from 5 mg to 400 mg of a compound of the invention in a suitable buffer solution such as phosphate buffer and, if necessary, a toning agent such as a salt such as sodium chloride . &Lt; / RTI &gt; The solution may be filtered, for example, using a 0.2 [mu] m filter to remove impurities and contaminants.

Accordingly, one embodiment includes a pharmaceutical composition comprising a compound of Formula I, or a stereoisomer or pharmaceutically acceptable salt thereof. In a further embodiment, the pharmaceutical composition comprises a pharmaceutically acceptable carrier or excipient together with a compound of formula I, or a stereoisomer or pharmaceutically acceptable salt thereof.

The following Examples A and B illustrate typical compositions of the present invention, but are provided only as a representative thereof.

Example A

The compounds of the present invention can be used in a manner known per se as the active ingredient for the production of tablets of the following composition.

Example B

The compounds of the present invention can be used in a manner known per se as the active ingredient for the production of capsules of the following composition.

Indications and treatment methods

The compounds of the present invention can inhibit de novo DNA synthesis of HBV and reduce HBV DNA levels. Accordingly, the compounds of the present invention are useful for the treatment or prevention of HBV infection.

The compounds of the present invention are useful as HBV capside inhibitors.

The present invention relates to the use of a compound of formula I or a compound of the invention for the treatment or prevention of HBV infection.

The use of a compound of formula I or a compound of the invention for the manufacture of a medicament useful for the treatment or prevention of diseases associated with HBV infection is an object of the present invention.

The invention relates in particular to the use of a compound of formula I or a compound of the invention for the manufacture of a medicament for the treatment or prevention of HBV infection.

Another embodiment includes a method of treating or preventing an HBV infection, comprising administering an effective amount of a compound of formula I, a stereoisomer, tautomer, prodrug, or pharmaceutically acceptable salt thereof.

Combination therapy

The compounds of the present invention may be used in combination with interferon, pegylated interferon, lamivudine, adefovir dipivoxil, entecavir, telbivudine, and tenofovir Isoproxil for the treatment or prevention of HBV.

Example

The invention will be more fully understood by reference to the following examples. However, the following examples should not be construed as limiting the scope of the invention.

Abbreviations used herein are as follows:

[?] _D ²⁰ : Optical rotation at 20 ° C

BOMCl: benzyl chloromethyl ester

CC ₅₀ : Concentration causing 50% cell death

CCK - 8: Cell Counting Kit-8

CCl ₄ : Carbon tetrachloride

Ct: Cycle Threshold

DIPEA: N, N -diisopropylethylamine

DCM: dichloromethylene

PE: Petroleum ether

DMSO: dimethylsulfoxide

DEA: diethylamine

DNA: deoxyribonucleic acid

EtOH: ethanol

EtOAc or EA: ethyl acetate

g: gram

EC ₅₀ : maximum effect half-life

h, hr, or hrs: hours

HAP: Heteroaryl dihydropyrimidine

HATU: 1- [bis (dimethylamino) methylene] -1H-1,2,3-triazolo [4,5-b] pyridinium 3-oxide hexafluorophosphate

HBeAb: hepatitis B e antibody

HBeAg: hepatitis B e antigen

HBsAg: Hepatitis B surface antigen

HCl: hydrogen chloride

HPLC: High Performance Liquid Chromatography

HPLC-UV: High performance liquid chromatography with ultraviolet detector

Hz: Hertz

IPA: isopropanol

LDA: Lithium diisopropylamide

Methanol-d ₄ : deuterated methanol

MeOH: methanol

mg: milligrams

MHz: megahertz

min or mins: minutes

mL: Milliliter

mm: millimeter

mM: mmol / L

mmol: millimolar

MS: mass spectrometry

MW: molecular weight

Na ₂ SO ₄ : Sodium sulfate

NaOH: sodium hydroxide

NBS: N -bromosuccinimide

NMR: nuclear magnetic resonance

PBS: phosphate buffered saline

PD: Pharmacokinetics

PK: Pharmacokinetics

prep-HPLC: High performance liquid chromatography for preparation

rt: room temperature

sat .: saturated

SFC: supercritical fluid chromatography

TEA: Triethylamine

Tet: tetracycline

TFA: Trifluoroacetic acid

THF: tetrahydrofuran

μg: microgram

μL: microliter

μM: micro mol

UV: ultraviolet detector

OD: optical density

pgRNA: a precursor genomic RNA

qPCR: Quantitative polymerase chain reaction

qRT-PCR: Quantitative real-time polymerase chain reaction

CYP: Cytochrome P450

[Ir (COD) ₂ Cl] ₂ : bis (1,5-cyclooctadiene) diaridium (I) dichloride

Cs ₂ CO ₃ : Cesium carbonate

Pd (OAc) ₂ : Palladium (II) acetate

NaBH ₄ : Sodium borohydride

RuCl ₃ : ruthenium (III) chloride

General experimental conditions

The intermediate and final compound were purified by flash chromatography using one of the following machines: i) Biotage SP1 system and Quad 12/25 cartridge module. ii) ISCO combi-flash chromatography machine. Silica gel brand and pore size: i) KP-SIL 60 A, particle size: 40-60 uM; ii) CAS Registration Number Silica gel: 63231-67-4, particle size: 47-60 占 퐉 silica gel; iii) ZCX from Qingdao Haiyang Chemical Co., Ltd, pores: 200-300, or 300-400.

The intermediate and final compound were purified by reverse phase column chromatography using an XBridge (TM) Prep-C18 (5 [mu] m, OBDTM 30 x 100 mm) column or SunFire (TM) Prep- Lt; / RTI &gt; for purification by preparative HPLC. Waters AutoP purification system (column: XBridge (TM) Prep-C18, 30 x 100 mm, sample manager 2767, pump 2525, detector: Micromass ZQ and UV 2487, solvent system: acetone in water Nitrile and 0.1% ammonium hydroxide). For SFC chiral separation, the intermediate was detected with UV detection at 254 nm, Mettler Toledo SFC-Multigram III system, solvent system: 95% CO ₂ and 5% IPA (0.5% TEA in IPA) (Daicel Chiralpak IC, 5 [mu] m, 30 x 250 mm).

The LC / MS spectra of the compounds were obtained using LC / MS (Waters (Alliance) 2795-Micromass ZQ) and LC / MS conditions were as follows (run time 6 min):

Acidic conditions: A: 0.1% formic acid in H ₂ O; B: 0.1% formic acid in acetonitrile;

Basic conditions: A: H ₂ O of 0.1% NH ₃ and H ₂ O; B: acetonitrile;

Neutral conditions: A: H ₂ O; B: Acetonitrile.

Mass spectrum (MS): Only ions that generally show a mass are reported, and unless quoted otherwise, the quoted mass ion is a positive mass ion (MH) ⁺ .

NMR spectra were obtained using a Bruker Avance 400 MHz.

A single crystal was mounted in the loop and cooled to 160 K in a nitrogen stream. Data were collected with a Gemini R Ultra diffractometer (Oxford Diffraction, UK) with Cu-K-alpha-radiation (1.54178 A) and analyzed using a Crysalis- -package). Structural solutions and improvements were performed using ShelXTL software (Bruker AXS, Karlsruhe, Germany).

Microwave assisted reactions were performed with a Biotage Initiator Sixty microwave synthesizer.

All reactions involving air-sensitive reagents were performed under an argon atmosphere. Unless otherwise indicated, the reagents were used as received from a conventional source without further purification.

Manufacturing example

The invention will be more fully understood by reference to the following examples. However, the embodiments should not be construed as limiting the scope of the present invention.

Example 1

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(6-oxo-1,3,4,8,9,9a-hexahydropyrazino [ ] [1,3] oxazin-2-yl) methyl] -2-thiazol-2-yl-1,4- dihydropyrimidine-

The title compound was prepared according to the general synthetic route shown in Scheme 1. A detailed synthetic route is provided in Scheme 2 below.

[Reaction Scheme 2]

Preparation of Compound A

To a stirred solution of thiazole-2-carbonitrile (1.5 g, 14 mmol) in anhydrous MeOH (5 mL) was added dropwise a solution of sodium methoxide (0.74 g, 14 mmol) in anhydrous methanol (10 mL). The reaction mixture was stirred at room temperature until the starting material disappeared. Ammonium chloride (1.5 g, 28 mmol) was then added in one portion and the reaction mixture was stirred overnight. The undissolved material was removed by filtration and the filtrate was concentrated to give thiazole-2-carboxamidine hydrochloride (Compound A) as a gray solid which was used directly in the next step without further purification. MS: Calcd. 128 (MH ⁺ ), Measurement 128 (MH ⁺ ).

Preparation of Compound B

To a solution of thiazole-2-carboxamidine hydrochloride (0.13 g, 1.0 mmol), methyl acetoacetate (0.12 g, 1.0 mmol) and 2-chloro-4-fluorobenzaldehyde ( 0.16 g, 1.0 mmol) in THF (20 mL) was added potassium acetate (0.20 g, 2.0 mmol). The reaction mixture was refluxed for 16 hours. After cooling to room temperature, the reaction mixture was concentrated, and the residue was dissolved in ethyl acetate and washed with brine. The organic layer was dried over sodium sulfate. The solvent was concentrated and the residue was purified by column chromatography (ethyl acetate / petroleum ether 1/4 to 1/2) to give 4- (2-chloro-4-fluoro-phenyl) Thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester (Compound B). MS: calculated (MH ⁺ ) 366, found (MH ⁺ ) 366.

Preparation of Compound B1

Methyl-2-oxazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester (Compound B) was chiral separation of the SFC (SFC-multigram; IC: 5 x 250 mm, 5μ) eluting with a mixed solvent of 85% supercritical CO ₂ /15% EtOH at a rate of 100 mL / min to give the enantiomer (R Yl) -l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester (compound B1). The desired (-) - enantiomer (B1) was eluted before the (+) - enantiomer (B2). The absolute arrangement of the (-) - enantiomer (B1) was determined by X-ray diffraction studies (Fig. 1).

Compound B1 : [?] _D ²⁰ -55.0 (c 0.845, MeOH).

Compound B2 : [?] _D ²⁰ +44.6 (c 0.175, MeOH).

Preparation of Compound C

CCl ₄ (5 mL) of (R) -4- (2- chloro-4-fluoro-phenyl) -6-methyl-2-thiazol-2-yl-1,4-dihydro-pyrimidin -5 -Carboxylic acid methyl ester (0.37 g, 1.0 mmol) in N, N-dimethylformamide (1 mL) was added NBS (0.20 g, 1.1 mmol) in one portion. The reaction mixture was stirred at room temperature for 1 hour, then the solvent was removed in vacuo and the residue was purified by column chromatography to give ( R ) -6-bromomethyl-4- (2-chloro-4- Phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester C). MS: Calcd. 445 (MH ⁺ ), Measurement 445 (MH ⁺ ).

Hexahydro-pyrazino [l, 2-c] [1,3] oxazin-6-one (Compound D)

Step 1: methyl 4-boc- piperazine-2-acetate was dissolved in (CAS No. 183742-33-8, Chem finder (Chemfinder)) (1.0 g, 4 mmol) to _{MeOH (10 mL), NaBH 4} ( 1.5 g, 40 mmol) was added dropwise and stirred overnight. The solvent was removed in vacuo and the residue was partitioned between EtOAc and water. The organic layer was separated and then dried over Na ₂ SO ₄ and concentrated to give 3- (2-hydroxy-ethyl) -piperazine-1-carboxylic acid tert - butyl ester (Compound E) as a crude oil, Used directly without further purification.

Step 2: 3- (2-Hydroxy-ethyl) -piperazine-l-carboxylic acid tert - butyl ester (58 mg, 0.25 mmol) was dissolved in dichloromethane (4 mL) and DIPEA (1 mL) Phosgene (27 mg, 0.09 mmol) was added at room temperature. The reaction mixture was stirred for 30 minutes and the solvent was removed in vacuo. The residue was dissolved in dichloromethane (3 mL) and TFA (1 mL). The reaction mixture was stirred for 1 hour and then the solvent was removed in vacuo to give hexahydro-pyrazino [1,2-c] [1,3] oxazin-6-one trifluoroacetic acid salt (compound D ) Which was used directly without further purification. LC / MS: calculated 157 (MH ⁺ ), found 157 (MH ⁺ ).

Preparation of Example 1

To a solution of ( R ) -6-bromomethyl-4- (2-chloro-4-fluoro-phenyl) -2-thiazol- Dihydro-pyrimidine-5-carboxylic acid methyl ester (0.072 g, 0.16 mmol) and hexahydro-pyrazino [1,2- c] [1,3] oxazin-6-one trifluoroacetic acid salt (compound D , Crude, 0.25 mmol) in THF (5 mL) was added dropwise DIPEA (0.078 mL, 0.45 mmol). The reaction mixture was stirred at room temperature until the starting material disappeared. The mixture was diluted with EtOAc (50 mL), washed successively with saturated aqueous NH ₄ Cl and brine. The organic layer was separated and dried over Na ₂ SO ₄ . The solvent was concentrated in vacuo and the crude product purified by prep-HPLC to give methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6- [ Yl) methyl] -2-thiazol-2-yl-l, 4-di 5-carboxylate (example 1) (11 mg). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (dd} , J = 3.01, 1.00 Hz, 1H), 7.81 (d, J = 3.01 Hz, 1H), 7.46 (dd, J = 8.66, 6.15 Hz (M, 1H), 7.26 (dd , J = 8.78, 2.51 Hz, 1H), 7.00-7.13 (m, 1H), 6.19 (d , J = 1.76 Hz, 1H), 4.19-4.48 d, J = 16.06 Hz, 1H ), 3.76-3.94 (m, 1H), 3.62 (s, 3H), 3.18-3.31 (m, 2H), 2.37-2.80 (m, 3H), 2.11-2.30 (m, 1H), 1.90 (qdd , J = 14.37, 14.37, 14.37, 9.22, 5.40 Hz, 1H). MS: Calcd. 520 (MH ⁺ ), found 520 (MH ⁺ ).

Example 2

(4-fluoro-phenyl) -6 - [(4-oxo-6,7,9,9a-tetrahydro-1H-pyrazino [ Yl] methyl] -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate

Hexahydro-pyrazino [l, 2-c] [1,3] oxazin-6-one (compound D) c] [1,4] oxazin-4-one (WuXi AppTec (Wuhan) Co., Ltd), catalog number: WX111240; Tang Pengcho , &Lt; / RTI &gt; PCT international application WO &lt; RTI ID = 0.0 &gt; 2012/019426). &Lt; / RTI &gt; Example 2 (9 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.14 Hz, 1H), 7.76 (d, J = 3.14 Hz, 1H), 7.43 (dd, J = 8.72, 6.09 Hz, 1H ), 7.24 (dd , J = 8.72,2.57 Hz, 1H), 6.96-7.12 (m, 1H), 6.18 (d , J = 2.26 Hz, 1H), 4.46-4.66 m, 3H), 3.77-4.05 (m, 3H), 3.53-3.73 (m, 4H), 2.94-3.13 (m, 2H), 2.81-2.94 (m, 1H), 2.15-2.52 (m, 2H). MS: Calcd. 520 (MH ⁺ ), found 520 (MH ⁺ ).

Example 3

Methyl] -4-methyl-4H-pyrrolo [2,3-c] pyridazin- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-

3- (2-hydroxy-ethyl) -piperazine-1-carboxylic acid t- butyl ester (compound E) in place of (S) -4- N -Boc-2-hydroxy-2-methyl-piperazine (CAS number: 314 741 -40-7, Bepharm), the title compound was prepared. Example 3 (21 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.93-8.00 (m} , 1H), 7.73-7.84 (m, 1H), 7.40-7.50 (m, 1H), 7.25 (dd, J = 8.66, 2.64 (M, 1H), 4.25 (d , J = 16.81 Hz, 1H), 4.13-4.22 (m, 1H), 3.99-4.13 (m, 2H ), 3.78-3.90 (m, 1H), 3.56-3.67 (m, 3H), 3.29-3.39 (m, 1H), 3.25 (d, J = 9.03 Hz, 1H) , 2.96 (d , J = 11.04 Hz, 1H), 2.30-2.61 (m, 2H). MS: Calc 506 (MH ⁺ ), found 506 (MH ⁺ ).

Example 4

Yl] methyl] -4- (4-trifluoromethyl-pyrimidin-4-yl) (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-

3- (2-hydroxy-ethyl) -piperazine-1-carboxylic acid t- butyl ester (compound E) in place of (R) -4-N-boc-2-hydroxymethyl-piperazine (CAS number: 278 788 -66-2, Befam), the title compound was prepared. Example 4 (20 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.92-8.00 (m} , 1H), 7.78 (d, J = 3.26 Hz, 1H), 7.44 (dd, J = 8.78, 6.02 Hz, 1H), 7.25 (d , J = 8.66, 2.64 Hz, 1H), 7.01-7.12 (m, 1H), 6.14-6.21 (m, 1H), 4.46 (t , J = 8.53 Hz, 1H), 4.18-4.26 ), 4.08-4.18 (m, 1H), 3.97-4.08 (m, 2H), 3.82-3.93 (m, 1H), 3.53-3.67 , J = 10.54 Hz, 2H), 2.46-2.60 (m, 1H), 2.28-2.44 (m, 1H). MS: Calc 506 (MH ⁺ ), found 506 (MH ⁺ ).

Example 5

Yl] methyl] -4 (4H) -6- [[(8aS) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-chloro-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ ] Pyrazin-2-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound F) was SFC chiral separation. Example 5 (14 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.90-7.99 (m} , 1H), 7.72-7.82 (m, 1H), 7.36-7.52 (m, 1H), 7.20-7.31 (m, 1H), 7.06 (td, J = 8.41, 2.76 Hz, 1H), 6.18 (s, 1H), 4.18 (d, J = 17.07 Hz, 1H), 3.97-4.04 (m, 2H), 3.86-3.97 (m, 1H) , 3.61 (s, 3H), 3.21 (d , J = 9.29 Hz, IH), 3.03-3.16 (m, IH), 2.83-2.95 (m, (m, 3 H), 1.66 - 1.82 (m, 1 H). MS: Calc 504 (MH ⁺ ), found 504 (MH ⁺ ).

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ ] Pyrazin-2-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound F)

1,2-a] pyrazin-6 (2H) -one (CAS (Compound C) instead of hexahydro- pyrazino [1,2- c] [1,3] oxazin- No. 117810-52-3, Behemam; for synthesis thereof, see Alvaro G. and Large C., PCT International Application WO 2008/090115) Compound F was prepared.

Example 6

Yl] methyl] -4 (4H) -6- [[(8aR) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-chloro-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

(4R) -4- (2-Chloro-4-fluoro-phenyl) -6 - [(6-oxo- l, 3,4,7,8,8a-hexahydropyrrolo [ 2-yl] -1,4-dihydropyrimidine-5-carboxylate (Compound F) was separated by SFC chiral separation to give the title compound . Example 6 (14 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.87-8.01 (m} , 1H), 7.71-7.81 (m, 1H), 7.36-7.49 (m, 1H), 7.19-7.29 (m, 1H), (Dd , J = 12.55, 3.01 Hz, 1H), 3.95-4.02 (m, 1H), 7.06 (td , J = 8.41, 2.51 Hz, (M, 3H), 2.33-2.54 (m, 3H), 2.22 (m, 1H), 3.89 (ddt , J = 10.73, 7.25, 7.25, (d , 1H, dddd, J = 13.08, 9.38, 7.65, 4.02 Hz, 1H), 2.12 (t , J = 10.92 Hz, 1H), 1.61-1.76 (m, MS: Calc 504 (MH ⁺ ), found 504 (MH ⁺ ).

Example 7

Methyl] -4-methyl-4H-pyrrolo [2,3-c] pyridazin- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-

Bromo-4-fluorobenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde and hexahydro-pyrazino [1,2-c] [1,3] oxazin- 6-one (for the synthesis of which is described in PCT international application WO &lt; RTI ID = 0.0 &gt; The title compound was prepared in analogy to example 1, Example 7 (19 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.26 Hz, 1H), 7.76 (d, J = 3.01 Hz, 1H), 7.35-7.48 (m, 2H), 7.11 (td J = 8.41, 2.76 Hz, 1H), 6.17 (s, IH), 4.09-4.19 (m, IH), 4.05 (dd , J = 12.80,2.76 Hz, (M, 3H), 2.31-2.54 (m, 3H), 2.15-2.28 (m, 1H), 3.91 (d , J = 10.63, 7.23, 7.23, ), 2.08 (t , J = 10.92 Hz, 1H), 1.61-1.75 (m, 1H). MS: Calcd. 548 (MH ⁺ ), Measurement 548 (MH ⁺ ).

Example 8

Yl] methyl] -4 (4H) -6- [[(8aR) -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [ - (2-bromo-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

Instead of 2-chloro-4-fluorobenzaldehyde, methyl acetoacetate and hexahydro-pyrazino [1,2-c] [1,3] oxazin- (8aR) -2,3,4,7,8,8a-hexahydro-lH-pyrrolo [1,2-a] pyrazin-6-one The title compound was prepared in analogy to example 1 using the method described in PCT International Application WO 2012/019426 to Tang et al. Example 8 (8 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.01 Hz, 1H), 7.76 (d, J = 3.26 Hz, 1H), 7.36-7.53 (m, 2H), 7.12 (td , J = 8.34, 2.64 Hz, 1H), 6.18 (s, 1H), 4.11-4.17 (m, 1H), 4.05 (q, J = 6.86 Hz, 2H), 3.97 (d, J = 16.81 Hz, 1H) J = 16.75, 12.86, 3.51 Hz, 1 H), 2.07 (t , J = 10.67 Hz, 1H), 1.61-1.75 (m, 1H), 1.15 (t , J = 7.15 Hz, 3H). MS: Calcd. 562 (MH ⁺ ), Measurement 562 (MH ⁺ ).

Example 9

Yl] methyl] -4 &lt; RTI ID = 0.0 &gt; - (3,4- difluorophenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-

(Compound D) instead of 2-chloro-4-fluorobenzaldehyde, methyl acetoacetate and hexahydro-pyrazino [1,2-c] [1,3] oxazin- (8aR) -2,3,4,7,8,8a-hexahydro-lH-pyrrolo [1,2-a] pyrazin-6-one (for its synthesis, , &Lt; / RTI &gt; PCT international application WO &lt; RTI ID = 0.0 &gt; 2012/019426). &Lt; / RTI &gt; Example 9 (11 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.94-8.05 (m} , 1H), 7.81 (d, J = 3.01 Hz, 1H), 7.14-7.33 (m, 3H), 5.74 (s, 1H) , 4.07-4.23 (m, 3H), 4.03 (dd, J = 13.05, 2.51 Hz, 1H), 3.83-3.94 (m, 2H), 3.09 (t, J = 12.55 Hz, 1H), 2.98 (d, J = 10.54 Hz, 2H), 2.28-2.52 (m, 3H), 2.20 (ddt, J = 17.00,9.29,3.80, 3.80 Hz, 1H), 2.05 (t , J = 10.92 Hz, 1H), 1.59-1.73 m, 1 H), 1.24 (t , J = 7.15 Hz, 3 H). MS: Calcd 502 (MH ⁺ ), found 502 (MH ⁺ ).

Example 10

Chloro-3-fluoro-phenyl) -6 - [(6-oxo-3,4,7,8,9,9a-hexahydro-lH-pyrido [ 2-al pyrazin-2-yl) methyl] -2-thiazol-2-yl-l, 4- dihydropyrimidine-

Instead of 2-chloro-4-fluorobenzaldehyde, methyl acetoacetate and hexahydro-pyrazino [l, 2-c] [1,3] oxazin- Fluoro benzaldehyde, ethylacetoacetate and 1,2,3,4,7,8,9,9a-octahydropyrido [l, 2-a] pyrazin-6-one hydrochloride salt (prepared according to J. & (J & W Pharm Lab), CAS number: 151665-85-9; see Ghelardini C. et al., PCT International Application WO 2009/103176 for its synthesis) The title compound was prepared. Example 10 (6 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.02 (d} , J = 3.26 Hz, 1H), 7.96 (d, J = 3.26 Hz, 1H), 7.23-7.38 (m, 2H), 7.10-7.21 (m, 2H), 1.52-21 (m, 2H), 2.63 (s, 3H) (m, 4 H), 1.21 (m, 3 H). MS: Calcd. 532 (MH ⁺ ), Measurement 532 (MH ⁺ ).

Example 11

Methyl (4R) -6 - [[(8aR) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-chloro-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

(8aS) -2,5,6,7,8,8a-hexahydro-lH-pyrrolo [2,3-c] [1,3] oxazin- Imidazo [l, 5-a] pyrazin-3-one (compound H), the title compound was prepared in analogy to example 1. Example 11 (11 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.93-8.01 (m} , 1H), 7.72-7.81 (m, 1H), 7.38-7.49 (m, 1H), 7.24 (dd, J = 8.66, 2.64 1H), 7.06 (td , J = 8.47,2.64 Hz, 1H), 6.18 (s, 1H), 4.04-4. 17 (m, 1H), 3.95-4.02 1H), 3.84 (dd, J = 13.43, 2.38 Hz, 1H), 3.61 (s, 3H), 3.53 (t, J = 8.91 Hz, 1H), 3.11-3.21 (m, 1H), 3.06 (dd, J = 9.41, 4.64 Hz, 1H) , 2.92 (dd, J = 9.79, 1.51 Hz, 1H), 2.84 (dd, J = 11.17, 2.64 Hz, 1H), 2.38 (td, J = 11.67, 3.51 Hz, 1H) , 2.19-2.29 (m, 1 H). MS: calculated for 505 (MH ⁺ ), found 505 (MH ⁺ ).

(8aS) -2,5,6,7,8,8a-hexahydro-1H-imidazo [1,5-a] pyrazin-3-one

Step 1: water (600 mL) of _{Na 2 CO 3 (118 g,} 1.11 mol) (2 S) in a solution of 25 ℃ -piperazine-2-carboxylic acid dihydrochloride salt (30 g, 0.15 mol) was added Was added followed by di- t- butyl dicarbonate (112 g, 0.56 mol) and tetrahydrofuran (300 mL). The mixture was then stirred at room temperature for a further 20 hours. The reaction mixture was concentrated in vacuo and the resulting solution was extracted three times with methyl t- butyl ether (200 mL) to remove apolar species. The water layer was cooled to below 0 &lt; 0 &gt; C and then treated with 3.0 M HCl until pH 2-3. It was then extracted three times with ethyl acetate (500 mL). The combined organic layers were dried over Na ₂ SO ₄ , filtered and concentrated in vacuo to give 39 g of compound I.

Step 2 : To a solution of compound &lt; RTI ID = 0.0 &gt; I (39 g, 0.12 mol) was added dropwise a BH ₃ .THF complex (240 mL, 0.24 mol) under N ₂ atmosphere at 0 ° C. The mixture was then warmed to room temperature and heated to reflux for 2 to 3 hours. The mixture was quenched with MeOH (100 mL) at 0 C and the resulting solution was concentrated in vacuo. The residue was redissolved in MeOH (200 mL) and the solution was refluxed for 3 to 4 hours. The solvent was then removed to give the crude product (45 g). The crude product was purified by silica column chromatography (petroleum ether / EtOAc = 10: 1 to 1: 1) to give compound J (31 g).

Step 3 : To a solution of the compound &lt; RTI ID = 0.0 &gt; Of J (15 g, 47.41 mmol) , Ph 3 P (16.17 g, 61.63 mmol) and phthalimide under N ₂ atmosphere at 10 ℃ To a solution of (9.07 g, 61.63 mmol) in tetrahydrofuran (20 mL)-diisopropyl A solution of propyl azodicarboxylate (12.46 g, 61.63 mmol) was added. The mixture was then stirred at &lt; RTI ID = 0.0 &gt; 10 C &lt; / RTI &gt; The mixture was quenched with 1 N HCl (100 mL) and extracted with EtOAc (300 mL). The organic layer was dried with Na ₂ SO _4, filtered and then concentrated in vacuo to give the crude product (50 g). The crude product was triturated with petroleum ether / EtOAc (200 mL, V / V = 5: 1) to give crude product (25 g) with triphenylphosphine oxide and other impurities removed. The crude product was purified by silica column chromatography (petroleum ether / EtOAc = 20: 1) to give pure compound K (12 g) and slightly impure compound K (4 g) as a white solid.

Step 4 : To a stirred solution of compound K (12 g, 26.9 mmol) in ethanol (85 mL) was added methylamine alcohol solution (85 mL) at room temperature. The mixture was then heated to reflux for an additional 3 hours. The mixture was cooled to room temperature and then concentrated. The resulting residue was dissolved in water (50 mL), then acidified to pH 3 with 1 N HCl solution and extracted three times with methyl- t- butyl ether (50 mL). The pH was adjusted to 10 with solid NaOH and the mixture was extracted three times with ethyl acetate (150 mL). The organic layer was dried and filtered, and the solvent was removed under reduced pressure to give compound L (6 g crude).

Step 5: To a stirred suspension of sodium hydride (1.0 g, 25 mmol) in tetrahydrofuran (50 mL) at 0 C was added compound L (6 g, 19 mmol, crude). The mixture was then heated to reflux for 2 hours. Additional NaH (1.0 g, 25 mmol) was then added to the mixture at room temperature. The reaction mixture was refluxed for 1 hour, then the reaction product was quenched with ice water (100 mL) and then extracted with EtOAc (300 mL). The organic layer was evaporated in vacuo to give the crude product (5 g). The crude product was purified by silica gel column chromatography (EtOAc / MeOH = 200: 1) to give compound M (2.2 g, 40%).

Step 6: TFA (10 mL) was added dropwise to a stirred solution of compound M (2.2 g, 9.1 mmol) in dichloromethane (30 mL). The reaction mixture was stirred for 1 hour and then the solvent was removed in vacuo to give (8aS) -2,5,6,7,8,8a-hexahydro-1H-imidazo [l, 5-a] pyrazine -3-one trifluoroacetic acid salt (Compound H), which was used directly without further purification.

Example 12

Methyl (4R) -6 - [[(8aS) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-chloro-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

(2 S) - piperazine-2-carboxylic acid instead of (2 R) to -piperazine-2-carboxylic acid The title compound was prepared in analogy to example 11 using was prepared. Example 12 (13 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.91-8.01 (m} , 1H), 7.71-7.81 (m, 1H), 7.42 (dd, J = 8.66, 6.15 Hz, 1H), 7.24 (dd, J = 8.66, 2.64 Hz, 1H), 7.05 (td , J = 8.41, 2.51 Hz, 1H), 6.18 (s, 1H), 4.12 (d , J = 17.32 Hz, 1H), 3.95-4.05 ), 3.91 (d , J = 17.32 Hz, 1H), 3.77 (dd , J = 13.18,1.88 Hz, 1H), 3.61 (s, 3H), 3.56-3.60 2H), 3.01 (dd, J = 10.79, 2.76 Hz, 1H), 2.74 (d, J = 11.29 Hz, 1H), 2.39 (t, J = 10.92 Hz, 1H), 2.24 (td, J = 11.67, 3.26 Hz, 1H). MS: calculated for 505 (MH ⁺ ), found 505 (MH ⁺ ).

Example 13

Ethyl] (4R) -6 - [[(8aS) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-bromo-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

The title compound was prepared in analogy to example 11 using 2-bromo-4-fluorobenzaldehyde and ethyl acetoacetate instead of 2-chloro-4-fluorobenzaldehyde and methyl acetoacetate. Example 13 (34 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.91-8.02 (m} , 1H), 7.78 (d, J = 3.01 Hz, 1H), 7.34-7.53 (m, 2H), 7.12 (td, J = (M, 1H), 3.61 (t , J = 8.91 Hz, 1H) 1H), 2.40 (br s, 1H), 1.14 (t , J = 7.15 Hz, 1H), 3.07-3.25 (m, 3H), 2.83-3.03 , 3H). MS: Calcd. 563 (MH ⁺ ), measurement 563 (MH ⁺ ).

Example 14

(4R) -6 - [[(8aR) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazin- - (2-bromo-4-fluoro-phenyl) -2- thiazol-2-yl-l, 4- dihydropyrimidine-

The title compound was prepared in analogy to example 12 using 2-bromo-4-fluorobenzaldehyde and ethyl acetoacetate instead of 2-chloro-4-fluorobenzaldehyde and methyl acetoacetate. Example 14 (34 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.92-8.01 (m} , 1H), 7.78 (d, J = 3.26 Hz, 1H), 7.35-7.56 (m, 2H), 7.12 (td, J = (M, 4H), 3.89 (dd , J = 13.55, 2.51 Hz, 1H), 3.49-3.64 (m, 1H), 3.17-3.28 (m, 1H), 2.97-3.17 (m, 3H), 2.31-2.68 (m, 2H), 1.14 (t , J = 7.15 Hz, 3H). MS: Calcd. 563 (MH ⁺ ), measurement 563 (MH ⁺ ).

Example 15

Yl) methyl] -4- (4-methylpiperazin-1-yl) (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(1,3- dioxo-5,6,8,8a-tetrahydroimidazo [ 7-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound N) was SFC chiral separated to give the title compound. Example 15 (11 mg) was obtained as a yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.89-7.97 (m} , 1H), 7.71-7.81 (m, 1H), 7.38-7.53 (m, 1H), 7.24 (dd, J = 8.78, 2.76 1H), 7.07 (td , J = 8.41, 2.76 Hz, IH), 6.19 (s, IH), 4.28-4.40 (m, IH), 4.15-4.26 2H), 3.61 (s, 3H ), 3.36 (d, J = 4.77 Hz, 1H), 3.20-3.29 (m, 1H), 2.78-2.86 (m, 1H), 2.42 (t, J = 11.17 Hz, 1H ), 2.29 (td , J = 11.86,3.64 Hz, 1 H). MS: Calcd. 519 (MH ⁺ ), Measurement 519 (MH ⁺ ).

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(1,3- dioxo-5,6,8,8a-tetrahydroimidazo [ Yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound N)

Tetrahydro-5H-imidazo [l, 5-a] pyrimidine instead of hexahydro-pyrazino [l, ] Pyrazine-1,3-dione (see WO 2010/23480 for its synthesis), the title compound was prepared in analogy to example 1.

Example 16

Yl) methyl] -4- (4-methylpiperazin-1-yl) (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-

Example 15 (2-Chloro-4-fluorophenyl) methyl (4 R) -6-4 - [(1,3- dioxo -5,6,8,8a- tetrahydro-imidazo [1 , 5-a] pyrazin-7-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound N) . Example 16 (10 mg) was obtained as a yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.90-7.97 (m} , 1H), 7.76 (d, J = 3.26 Hz, 1H), 7.37-7.49 (m, 1H), 7.24 (dd, J = 1H , J = 8.41, 2.76 Hz, 1H), 7.06 (td , J = 8.41, 2.76 Hz, 1H), 6.19 , J = 13.43, 2.89 Hz, 1H), 3.98-4.06 (m, 1H), 3.61 (s, 3H), 3.27 (td, J = 12.67, 3.76 Hz, 1H), 3.18 (dd, J = 11.04, 4.27 1H), 2.97-3.04 (m, 1H), 2.44 (td , J = 11.80, 3.76 Hz, 1H), 2.29 (t , J = 11.17 Hz, 1H). MS: Calcd. 519 (MH ⁺ ), Measurement 519 (MH ⁺ ).

Example 17

Methyl (4R) -6 - [[(3aS) -1,1-dioxo-2,3,3a, 4,6,7- hexahydro- [1,2,5] thiadiazolo [ (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl- l, 4- dihydropyrimidine-5-carboxylate

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(1,1-dioxo-2,3,3a, 4,6,7- hexahydro- [ Thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound O) was reacted with SFC Chiral separation afforded the title compound. Example 17 (14 mg) was obtained as a yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.93-8.00 (m} , 1H), 7.77 (d, J = 3.01 Hz, 1H), 7.44 (dd, J = 8.78, 6.02 Hz, 1H), 7.25 (dd , J = 8.66, 2.64 Hz, 1H), 7.06 (td , J = 8.41, 2.76 Hz, 1H), 6.18 (s, 1H), 4.12-4.26 ), 3.58-3.70 (m, 4H), 3.42-3.55 (m, 2H), 3.03-3.20 (m, 4H), 2.63-2.76 (m, 1H), 2.42 (t , J = 10.54 Hz, 1H). MS: Calcd. 541 (MH ⁺ ), measurement 541 (MH ⁺ ).

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6 - [(1,1-dioxo-2,3,3a, 4,6,7- hexahydro- [ , 5] thiadiazolo [2,3- a] pyrazin-5-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate

(Compound D) instead of hexahydro-pyrazino [1,2-c] [1,3] oxazin-6-one (Compound P), the title compound was prepared in analogy to example 1. &lt; RTI ID = 0.0 &gt;

Hexahydro-1-thia-2,5,7a-triaza-indene 1,1-dioxide (Compound P)

To a stirred solution of 3-aminomethyl-piperazine-1-carboxylic acid tert - butyl ester (CAS # 1376099-80-7, Befam) (215 mg, 1.0 mmol) in pyridine (2 mL) ). The reaction mixture was heated to 150 &lt; 0 &gt; C for 6 hours under microwave. The solvent was removed in vacuo and the residue was dissolved in dichloromethane (3 mL) and TFA (1 mL). The reaction mixture was stirred for 1 hour and the solvent was removed in vacuo to give crude Compound P which was used directly without further purification. LC / MS: calculated 178 (MH ⁺ ), found 178 (MH ⁺ ).

Example 18

Methyl (4R) -6 - [[(3aR) -1,1-dioxo-2,3,3a, 4,6,7- hexahydro- [1,2,5] thiadiazolo [ (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl- l, 4- dihydropyrimidine-5-carboxylate

(4R) -4- (2-Chloro-4-fluoro-phenyl) -6 - [(1,1-dioxo-2,3,3a, 4,6,7- hexahydro- Thiadiazolo [2,3-a] pyrazin-5-yl) methyl] -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate O) &lt; / RTI &gt; was SFC enantiomeric to give the title compound. Example 18 (28 mg) was obtained as a yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.26 Hz, 1H), 7.79 (d, J = 3.26 Hz, 1H), 7.45 (dd, J = 8.78, 6.02 Hz, 1H ), 7.25 (dd, J = 8.78, 2.51 Hz, 1H), 7.07 (td, J = 8.41, 2.76 Hz, 1H), 6.19 (s, 1H), 4.32 (d, J = 16.81 Hz, 1H), 4.09 (d , J = 16.81 Hz, 1H), 3.67-3.81 (m, 1H), 3.58-3.66 (m, 3H), 3.46-3.58 (m, 2H), 3.29-3.31 J = 9.79, 8.78 Hz, 1H), 3.02-3.19 (m, 2H), 2.69 (q , J = 10.79 Hz, 2H). MS: Calcd. 541 (MH ⁺ ), measurement 541 (MH ⁺ ).

Example 19

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid

Instead of 2-chloro-4-fluorobenzaldehyde, methyl acetoacetate and hexahydro-pyrazino [l, 2-c] [1,3] oxazin- Fluoro benzaldehyde, ethyl acetoacetate and 3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- The title compound was prepared in analogy to example 1 using 2,2-dimethyl-propanoic acid (compound Q). Example 19 (12 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.92-8.02 (m} , 1H), 7.70-7.80 (m, 1H), 7.21-7.36 (m, 2H), 7.10-7.21 (m, 1H), (M, 1H), 3.99-4.14 (m, 3H), 3.81-3.96 (m, 3H), 3.47-3.56 2H), 2.30-2.41 (m, 1H), 2.13-2.23 (m, 1H), 1.20 (m, (d , J = 2.76 Hz, 6H), 1.13 (m, 3H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

3 - [( 8aS ) -3-oxo-1,5,6,7,8,8a- Hexahydroimidazo [1,5-a] pyrazine -2-yl] -2,2-dimethyl-propanoic acid (Compound Q)

Step 1: To a solution of ( R ) -4- N- boc-2-hydroxymethyl-piperazine (CAS No. 314741-40-7, Befam; Synthesis thereof in 45 mL of saturated NaHCO ₃ and 45 mL of EtOAc reference to [Gao H., Renslo AR J. Org . Chem. 2007, 72, 8591-8592] and references) (6 g, 27.8 mmol) benzyl chloroformate (7.13 g, 41.7 eseo 0 ℃ to a stirred solution of the mmol) was added dropwise. The reaction mixture was then stirred at room temperature for 15 hours. The reaction product was diluted with EtOAc (60 mL), the organic layer was separated and the aqueous layer was extracted with EtOAc (35 mL). The combined organic layers were dried with Na ₂ SO _4, and the solution is concentrated to give the crude product. The crude product was purified by silica column chromatography (petroleum ether / EtOAc = 10: 1 to 1: 1) to give compound R (6.7 g).

Step 2: Dimethyl sulfoxide (4.47 g, 57.3 mmol) was added dropwise to a stirred solution of oxalyl chloride (3.64 g, 28.65 mmol) in anhydrous dichloromethane (80 mL) at -78 ° C. After 10 minutes, a solution of the compound &lt; RTI ID = 0.0 &gt; R &lt; / RTI &gt; (6.7 g, 19.1 mmol). The mixture was stirred at -78 &lt; 0 &gt; C for 30 minutes, then N, N -diisopropylethylamine (14.78 g, 114.6 mmol) was added and the reaction mixture was stirred for 30 minutes. Then it was slowly warmed over a period of 30 minutes to the reaction mixture at 0 ℃, diluted with dichloromethane (80 mL), washed with 5% aqueous citric acid (10 mL) and brine and dried over Na ₂ SO _4. After filtration, the mixture was concentrated in vacuo to give crude product S (7 g).

Step 3: To a stirred solution of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt (3.4 g, 18.6 mmol) in anhydrous DCM (100 mL) at room temperature was added DIPEA (2.6 g, 27.3 mmol) Was added. Compound S (7 g, 20 mmol) was then added followed by NaBH (OAc) ₃ (6.3 g, 29.8 mmol) and AcOH (1.5 mL). The reaction mixture was stirred at room temperature for 16 hours. Water (100 mL) was added and the mixture was extracted with DCM (100 mL). The organic layer was dried and concentrated to dryness in vacuo to give crude Compound T (7.3 g).

Step 4: To a solution of &lt; RTI ID = 0.0 &gt; T (3.3 g, 6.9 mmol) in THF (5 mL) was added Pd / C (1 g). The mixture was then stirred under a hydrogen atmosphere (50 Psi) at 50 &lt; 0 &gt; C for 3 hours. The reaction mixture was filtered and the filtrate was concentrated in vacuo to give compound U (1.8 g).

Step 5: To a solution of compound U (1.8 g, 5.24 mmol) in anhydrous dichloromethane (60 mL) at 0 C was added N, N -diisopropylethylamine (3.4 g, 26.2 mmol). Triphosgene (783 mg, 2.62 mmol) was then added at 0 &lt; 0 &gt; C and the mixture was stirred at 10-15 [deg.] C for 16 h. Water (50 mL) was added and the mixture was extracted with dichloromethane (60 mL) and then dried over Na ₂ SO ₄ . The solvent was removed in vacuo to give the crude product. The crude product was purified by silica column chromatography (petroleum ether / EtOAc = 5: 1 to 1: 1) to give compound V (1.3 g).

Step 6: To a solution of THF (3 ml) of compound V (240 mg, 0.64 mmol) LiOH and _{H 2 O (215 mg, 5.10} mmol) in H ₂ O (1 mL) at room temperature was added dropwise a solution of . The reaction mixture was stirred overnight at room temperature and then acidified to pH 3-4 with 1 N HCl at 0 &lt; 0 &gt; C. The mixture was then concentrated and azeotropically dried in toluene to give the crude product which was dissolved in dichloromethane (2 mL) and treated with trifluoroacetic acid (2 mL) at room temperature. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give 3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid (compound Q) was obtained and used directly.

Example 20

3 - [(8aS) -7 - [[(4R) -4- (2-Chlorophenyl) -5- ethoxycarbonyl-2-thiazol-2-yl-1,4- dihydropyrimidine- -Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-

Chloro-4-fluorobenzaldehyde and ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt with 2-chlorobenzaldehyde and methyl 3-amino-2-methyl-propanoate hydrochloride The title compound was prepared in analogy to example 19 using the chloride salt (compound W). Example 20 (20 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.01 Hz, 1H), 7.75 (d, J = 3.01 Hz, 1H), 7.42 (d, J = 7.78 Hz, 2H), 3H), 3.43-3.59 (m, 2H), 3.26-3.43 (m, 2H), 3.74-3. (M, 2H), 2.65-2.80 (m, 1H), 2.35 (t , J = 10.79 Hz, 1H), 2.19 (q , J = 10.46 Hz, 1H), 1.06-1.24 (m, 5H). MS: Calculated 587 (MH ^&lt; ⁺ & gt ^; ), found 587 (MH ^&lt; ⁺ & gt ^; ).

Preparation of methyl 3-amino-2-methyl-propanoate hydrochloride salt (Compound W)

MeOH (50 mL) of DL-3- amino-isobutyric acid (CAS number: 144-90-1, Aldrich _{(Aldrich)) SOCl 2 (6.17} g under a N ₂ atmosphere at 0 ℃ To a solution of (2.7 g, 26.4 mmol) , 52.8 mmol) was added dropwise. The reaction product was refluxed for 18 hours. The solvent was removed in vacuo to give crude Compound W, which was used directly in the next step.

Example 21

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- mountain

Amino-2-methyl-propanoate hydrochloride salt (Compound W) in place of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt, the title compound . Example 21 (10 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.26 Hz, 1H), 7.76 (d, J = 3.26 Hz, 1H), 7.21-7.36 (m, 2H), 7.10-7.21 (m, 2H), 3.24-3.42 (m, 2H), 3.08 (m, 3H) 1H), 2.30-2.43 (m, 1H), 2.13-2.27 (m, 2H), 2.73 (m, 2H), 2.73 (ddt, J = 10.63, 7.00, 3.73, 3.73 Hz, 1H), 1.08-1.24 (m, 5H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 22

Methyl-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2-dimethyl-propanoic acid

The title compound was prepared in analogy to example 19 using 2-methyl-3,4-difluorobenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde. Example 22 (2 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.88-8.00 (m} , 1H), 7.69-7.80 (m, 1H), 6.95-7.13 (m, 2H), 5.88-5.99 (m, 1H), 2H), 3.79-3.97 (m, 3H), 3.47-3.54 (m, 1H), 3.36-3.44 2H), 2.76-2.94 (m, 2H), 2.57 (d , J = 2.26 Hz, 3H), 2.31-2.42 ). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Example 23

(2-chloro-3-fluoro-phenyl) -6- [[2- (2-methoxy- 5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-7-yl] methyl] -2- thiazol- - carboxylate

The title compound was prepared in analogy to example 19 using methyl 3-amino-2-methyl-propanoate hydrochloride salt instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt. Example 23 (4 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.94-8.03 (m} , 1H), 7.72-7.82 (m, 1H), 7.22-7.38 (m, 2H), 7.11-7.20 (m, 1H), (M, 2H), 3.76-3.84 (m, 1H), 3.74 (d, J = 1.00 Hz, 2H), 3.59-3.71 J = 7.78 Hz, 6H), 1.14 (t , J = 7.8 Hz, 2H), 2.20-3. 7.03 Hz, 3H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

Example 24

Methyl 7 - [[(4R) -4- (2-chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- -Yl] methyl] -3-oxo-2,5,6,8-tetrahydro-1H-imidazo [1,5- a] pyrazine-8a-

Instead of 2-chloro-4-fluorobenzaldehyde, methyl acetoacetate and hexahydro-pyrazino [l, 2-c] [1,3] oxazin- (Compound X) was used instead of ethyl acetoacetate and methyl 3-oxo-1,2,5,6,7,8-hexahydroimidazo [1,5-a] pyrazine-8a- The title compound was prepared in analogy to example 1, Example 24 (5 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.26 Hz, 1H), 7.76 (d, J = 3.26 Hz, 1H), 7.27-7.35 (m, 1H), 7.26 (s 1H), 3.67 (s, 3H), 3.87-3.95 (m, 1H), 3.78-3.85 1H), 3.46 (d , J = 9.79 Hz, 2H), 3.35-3.42 (m, 2H), 2.87-2.99 1.12 (t , J = 7.15 Hz, 3 H). MS: Calculated 577 (MH ^&lt; ⁺ & gt ^; ), found 577 (MH ^&lt; ⁺ & gt ^; ).

Preparation of methyl 3-oxo-1,2,5,6,7,8-hexahydroimidazo [1,5-a] pyrazine-8a-carboxylate (Compound X)

Step 1 : Piperazine-l, 3-dicarboxylic acid l - tert - butyl ester 3-methyl ester (244 mg, 1.0 mmol) was dissolved in dichloromethane (5 mL) followed by additional TEA (202 mg, 2.0 mmol ) And benzyl chloroformate (170 mg, 1.0 mmol) were added successively. The reaction product was stirred for 1 hour, diluted with dichloromethane, and washed with water and brine. The solvent was concentrated to give crude Compound Y, which was used directly without further purification.

Step 2 : Piperazine-1,2,4-tricarboxylic acid 1-benzyl ester from the previous step 4 -t- Butyl ester 2-methyl ester (compound Y) was dissolved at -78 ° C and LDA mL, 2 mmol) was added dropwise. The reaction mixture was stirred for 2 h at -78 <0> C and then 2-bromomethyl-isoindole-l, 3-dione (239 mg, 1 mmol) in THF (2 mL) was added. The reaction mixture was stirred overnight. The solvent was removed in vacuo and the residue was triturated with petroleum ether. The solids were collected by filtration, washed with water and dried in vacuo to give compound Z.

Step 3 : 2- (l, 3-Dioxo-l, 3-dihydro-isoindol-2-ylmethyl) -piperazine- l, 2,4-tricarboxylic acid l- benzyl ester 4- the t- butyl ester 2-methyl ester (compound Z) was dissolved in EtOH (3 mL) and N ₂ H ₄ solution (1 mL). The reaction mixture was stirred overnight at room temperature. The solid was filtered off and the filtrate was concentrated in vacuo. The crude oil was dissolved in MeOH (10 mL) and stirred with Pd / C (50 mg) overnight under an H ₂ atmosphere. After filtration, the solvent was concentrated in vacuo to give crude compound AA (100 mg) as an oil which was used directly in the next step without further purification.

Step 4 : To a solution of 3-aminomethyl-piperazine-l, 3-dicarboxylic acid l - tert - butyl ester 3-methyl ester (compound AA) from step 3 in dichloromethane (4 mL) and DIPEA (1 mL) After dissolution, triphosgene (108 mg, 0.36 mmol) was added at room temperature. The reaction mixture was stirred for 30 minutes and then the solvent was removed in vacuo. The residue was dissolved in dichloromethane (3 mL) and TFA (1 mL). The reaction mixture was stirred for 1 hour at room temperature and the solvent was removed in vacuo to give crude Compound X which was used directly without further purification.

Example 25

(R) -6- [(S) -2- (4-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid methyl ester

(8aS) -3-oxo-1,5,6,7,8-tetrahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1 using 8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] benzoic acid (compound AB). Example 25 (45 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.93-8.06 (m} , 3H), 7.79 (d, 1H), 7.64-7.75 (m, 2H), 7.45 (m, 1H), 7.25 (m, 1H), 7.08 (m, IH), 6.19 (s, IH), 4.22 (d, IH), 3.95-4.15 (m, 4H), 3.53-3.66 (d, 2H), 3.03-3.17 (m, 2H), 2.50-2.63 (m, 1H), 2.35 (br. MS: Calculated 625 (MH &lt; + &gt;), found 625 (MH ^&lt; ⁺ & gt ^; ).

Preparation of 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2- yl] benzoic acid (compound AB)

Step 1 : To a solution of t- butyl (8aR) -3-oxo-1,2,5,6,8,8a-hexahydroimidazo [1,5- a] pyrazine-7- compound M, 200 mg, 0.83 mmol) , janteu phosphine (46 mg, 0.08 mmol), Cs 2 CO 3 (378 mg, 1.16 mmol), Pd (OAc) 2 (18 mg, 0.08 mmol) and 4-iodo- Benzoic acid methyl ester (282 mg, 1.08 mmol) was degassed three times with argon atmosphere. The mixture was stirred at room temperature for 5 minutes under an argon atmosphere and then heated at 90 &lt; 0 &gt; C overnight. The mixture was diluted with EtOAc (20 mL) and filtered through celite. The filtrate was concentrated and purified by silica gel to obtain compound AC (240 mg).

Step 2 : To a solution of compound AC (240 mg, 0.64 mmol) in THF (3 mL) was added a solution of LiOH.H ₂ O (215 mg, 5.10 mmol) in H ₂ O (1 mL) at room temperature. The reaction mixture was stirred overnight at room temperature and then acidified to pH 3-4 with 1 N HCl at 0 &lt; 0 &gt; C. The mixture was then concentrated and azeotropically dried in toluene to give compound AD (231 mg) which was used directly in the next step without further purification.

Step 3 : To a solution of compound AD (231 mg, 0.64 mmol) in dichloromethane (2 mL) was added TFA (2 mL) at room temperature. The mixture was stirred at room temperature for 1 hour and then concentrated to give methyl 4- (3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin- Benzoic acid (compound AB) (240 mg).

Example 26

(R) -6- [(S) -2- (4-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid ethyl ester

The title compound was prepared in analogy to example 25 using 2-chloro-3-fluorobenzaldehyde and ethyl acetoacetate instead of 2-chloro-4-fluorobenzaldehyde and methyl acetoacetate. Example 26 (76 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.85-7.96 (m} , 3H), 7.79 (d, 1H), 7.61 (d, 2H), 7.23-7.30 (m, 2H), 7.08-7.19 ( (m, 2H), 3.97 (m, 2H), 3.57 (d, IH) -3.73 (m, 3H), 3.36-3.49 (m, 1H), 3.02-3.16 (m, 2H), 0.95-1.08 (m, 3H). MS: Calculated 639 (MH ^&lt; ⁺ & gt ^; ), Found 639 (MH ^{& lt} ; ⁺ & gt ^; ).

Example 27

(R) -6- [(S) -2- (3-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid ethyl ester

4-fluorobenzaldehyde, methyl acetoacetate and 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazine Chloro-3-fluorobenzaldehyde, ethyl acetoacetate and 3 - [(8aS) -3-oxo-1,5,6,7,8,8a- The title compound was prepared in analogy to example 25 using hexahydroimidazo [l, 5-a] pyrazin-2-yl] benzoic acid (compound AE). Example 27 (20 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.11 (s} , 1H), 7.90 (d, 1H), 7.75-7.82 (m, 2H), 7.66 (d, 1H), 7.37 (m, 1H) 1H), 4.15-4.25 (m, IH), 7.23-7.29 (m, 2H), 7.07-7.17 (M, 2H), 3.97 (m, 2H), 3.52-3.67 (m, 3H), 3.36-3.46 . MS: Calculated 639 (MH ^&lt; ⁺ & gt ^; ), Found 639 (MH ^{& lt} ; ⁺ & gt ^; ).

Preparation of 3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2- yl] benzoic acid (Compound AE)

Compound AE was prepared analogously to compound AB of Example 25 using 3-iodo-benzoic acid methyl ester instead of 4-iodo-benzoic acid methyl ester.

Example 28

(2-carboxy-phenyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin-7-ylmethyl] -4- (2- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid ethyl ester

4-fluorobenzaldehyde, methyl acetoacetate and 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazine Chloro-3-fluorobenzaldehyde, ethyl acetoacetate and 2 - [(8aS) -3-oxo-1,5,6,7,8,8a- Hexahydroimidazo [l, 5-a] pyrazin-2-yl] benzoic acid (Compound AF) the title compound was prepared in analogy to example 25. &lt; Example 28 (95 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.83-7.93 (m} , 2H), 7.80 (d, 1H), 7.53 (m, 1H), 7.24-7.35 (m, 4H), 7.08-7.19 ( (m, IH), 6.16 (s, IH), 4.66 (d, IH), 4.48 (d, IH), 4.20-4.29 3H), 3.65 (d, 2H), 3.29-3.55 (m, 3H), 3.13 (m, 1H), 1.02 (m, 3H). MS: Calculated 639 (MH ^&lt; ⁺ & gt ^; ), Found 639 (MH ^{& lt} ; ⁺ & gt ^; ).

Preparation of 2 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] benzoic acid (Compound AF)

The title compound was prepared in analogy to compound AB of Example 25 using 2-iodo-benzoic acid methyl ester instead of 4-iodo-benzoic acid methyl ester.

Example 29

(R) -6- [(S) -2- (3-carboxy-phenyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid methyl ester

(Compound AB) instead of 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- (8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] benzoic acid (Compound AE) The title compound was prepared. Example 29 (220 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.20-8.26 (m} , 1H), 8.03 (d, 1H), 7.85-7.96 (m, 2H), 7.78 (m, 1H), 7.56 (m, (M, 1H), 7.49 (m, 1H), 7.30 (m, 1H), 7.13 (M, 2H), 3.72-3.90 (m, 3H), 3.65 (s, 3H), 3.51-3.61 (m, 1H). MS: Calculated 625 (MH ^&lt; ⁺ & gt ^; ), found 625 (MH ^&lt; ⁺ & gt ^; ).

Example 30

2- [7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -2-cyclopropyl-3-oxo-1,5,6,8-tetrahydroimidazo [1,5- a] pyrazin-

(8aS) -3-oxo-1,5,6,7,8-tetrahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1 using 8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] benzoic acid (compound AG). Example 30 (48 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.93 (d} , J = 3.0 Hz, 1H), 7.73 (d, J = 3.0 Hz, 1H), 7.43 (dd, J = 6.1, 8.7 Hz, 1H ), 7.24 (dd, J = 2.5, 8.8 Hz, 1H), 7.06 (d, J = 2.8 Hz, 1H), 6.16 (s, 1H), 4.14 (d, J = 16.6 Hz, 1H), 3.85-3.71 (m, 2H), 3.60 ( s, 3H), 3.46 (d, J = 9.8 Hz, 1H), 3.30-3.15 (m, 3H), 3.06 (d, J = 11.3 Hz, 1H), 2.95-2.82 ( 2H), 2.45 (d , J = 5.0 Hz, 1H), 2.39-2.29 (m, 1H), 2.22 (d , J = 11.5 Hz, 1H), 0.83-0.53 (m, 4H). MS: Calcd. 604 (MH ⁺ ), Measurement 604 (MH ⁺ ).

Preparation of 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] benzoic acid (Compound AG)

Step 1: dichloromethane (250 mL) of the piperazine-1,3-dicarboxylic acid 1- t- butyl ester 3-methyl ester _{(10.6 g, 43 mmol) 2} O (19 eseo 0 ℃ (Boc) To a solution of g, 86 mmol). The reaction mixture was stirred at room temperature for 4 hours, then quenched with water and then extracted with dichloromethane. The organic layer was dried over anhydrous Na ₂ SO ₄ and the filtrate was concentrated. The residue was purified by silica gel column chromatography to obtain Compound AH (13.6 g, yield 92%).

Step 2: To a solution of compound AH (13.4 g, 38.9 mmol) in anhydrous THF (200 mL) was added freshly prepared LDA (2 M in THF, 38 mL) at -78 < The reaction mixture was stirred at -78 &lt; 0 &gt; C for 30 min and then allowed to warm to room temperature for 30 min. The mixture was cooled to -78 C and a solution of allyl bromide (6.7 mL, 77.9 mmol) in THF (10 mL) was added. The mixture was warmed to room temperature and stirred overnight, then the solvent was removed under reduced pressure. The residue was purified by silica gel column chromatography to obtain Compound AI (13.6 g, yield 91%).

Step 3: To a solution of compound AI (1.0 g, 2.6 mmol) in anhydrous THF (20 mL) was added LAH (2 M in THF, 1.3 mL) at -78 < The reaction mixture was stirred at -78 &lt; 0 &gt; C for 30 min, then warmed to room temperature and stirred overnight. Anhydrous Na ₂ SO ₄ was added. After 1 h, the filtrate was concentrated. The residue was purified by silica gel column chromatography to obtain Compound AJ (0.7 g, yield 75%).

Step 4: To a solution of compound AJ (3 g, 8.4 mmol) in anhydrous dichloromethane (50 mL) at 0 C was added des-Martin ferriodin (6 g, 14.1 mmol). The reaction mixture was stirred at room temperature for 2 hours and then quenched with water. Extract the filtrate with dichloromethane, dried over anhydrous Na ₂ SO ₄ and concentrated the filtrate to give the compound AK without further purification.

Step 5: To a stirred solution of compound AK (1.5 g, 4.2 mmol) in dichloromethane (15 mL) was successively added acetic acid and cyclopropylamine (0.29 mL, 4.2 mmol). The reaction mixture was stirred at room temperature for 2 hours, then sodium triacetoxyborohydride (520 mg, 8.4 mmol) was added and the reaction mixture was stirred at room temperature for 3 hours. The reaction mixture was quenched with saturated NH ₄ Cl. Water (20 mL) was then added followed by dichloromethane (40 mL). The organic layer was separated, washed with brine, and dried over Na ₂ SO ₄ . The filtrate was concentrated to give compound AL without further purification.

Step 6: To a solution of compound AL (1.5 g, 3.8 mmol) in anhydrous THF (20 mL) was added NaH (0.26 g, 9.4 mmol) at 0 ° C. The reaction mixture was stirred at 85 &lt; 0 &gt; C overnight. The reaction product was then cooled to room temperature, quenched with water and extracted with dichloromethane. After drying the organic layer over anhydrous Na ₂ SO ₄ and concentrated in vacuo. The residue was purified by silica gel column chromatography to obtain compound AM (1.0 g, yield 82%).

Step 7: To a solution of compound AM (700 mg, 2.2 mmol) in H ₂ O (1 mL) and CH ₃ CN (6 mL) under nitrogen atmosphere was added RuCl ₃ .H ₂ O (18 mg, 0.086 mmol) then, it was added _{NaIO 4 (2.7 g, 12.6 mmol} ). The reaction product was stirred overnight at room temperature. The mixture was diluted with water and ethyl ether, filtered through a celite pad, and the pad was washed with ethyl ether. The aqueous layer was extracted with dichloromethane. The combined organic layers were dried over Na ₂ SO ₄ and concentrated to give compound AN (450 mg, yield 60%).

Step 8: To a solution of compound AN (600 mg, 1.76 mmol) in dichloromethane (8 mL) at 0 C was added TFA (2 mL). The reaction mixture was stirred for 2 hours at room temperature and then concentrated to give compound AG without further purification.

Example 31

2- [7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -2-isopropyl-3-oxo-1,5,6,8-tetrahydroimidazo [1,5- a] pyrazin-

(Compound A) instead of 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- Similar to Example 30, using 2-isopropyl-3-oxo-5,6,7,8-tetrahydro-1H-imidazo [1,5- a] pyrazin-8a-yl) acetic acid (Compound AO) The title compound was prepared. Example 31 (8 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.94 (d} , J = 3.0 Hz, 1H), 7.73 (d, J = 3.3 Hz, 1H), 7.43 (dd, J = 6.0, 8.8 Hz, 1H 2H), 3.79 (d , J = 16.6 Hz, 1H), 7.24 (dd , J = 2.8,8.8 Hz, 1H), 7.11-7.02 (m, 2H), 3.61 (s, 3H ), 3.47 (d, J = 9.5 Hz, 1H), 3.29-3.24 (m, 1H), 3.20 (d, J = 9.5 Hz, 1H), 3.09 (d, J = 11.5 Hz, 1H), 2.90 (d , J = 15.6 Hz, 2H), 2.38-2.12 (m, 3H), 1.18 (d , J = 7.0 Hz, 3H), 1.12 (d , J = 6.8 Hz, 3H). MS: Calculated 606 (MH ^&lt; ⁺ & gt ^; ), found 606 (MH ^&lt; ⁺ & gt ^; ).

Preparation of 2- (2-isopropyl-3-oxo-5,6,7,8-tetrahydro-1H-imidazo [1,5- a] pyrazin-8a-yl) acetic acid (Compound AO)

The title compound was prepared in analogy to example 30, compound AG using iso-propylamine instead of cyclopropylamine.

Example 32

Methyl-ethyl) -3-oxo-hexahydro-imidazo [1,5-a] pyrazin-7-ylmethyl] -4 2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester

The title compound was prepared in analogy to example 19 using methyl 2-amino-2-methyl-propanoate hydrochloride salt instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt. Example 32 (60 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.98 (d} , 1H), 7.79 (d, 1H), 7.23-7.38 (m, 2H), 7.09-7.23 (m, 1H), 6.25 (s, 2H), 3.14-3.29 (m, 2H), 2.89-3.14 (m, 2H), 4.23 (m, (m, 2H), 2.54 (br.s, 2H), 1.40-1.57 (m, 6H), 1.04-1.19 (m, 3H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 33

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carbonic acid

2-chloro-3-fluorobenzaldehyde, ethyl acetoacetate and 3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazine Chloro-4-fluorobenzaldehyde, methyl acetoacetate and 3 - [(8aS) -3-oxo-1,5-dihydro- The title compound was prepared in analogy to example 19, using 6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] Respectively. Example 33 (381 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.01 (d} , J = 4.0 Hz, 1H), 7.90-7.91 (d, J = 4.0 Hz, 1H), 7.55 (m, 1H), 7.29 (m, 1H), 7.13 ( m, 1H), 6.20 (s, 1H), 4.76 (d, J = 16.0 Hz, 1H), 4.60 (d, J = 16.0 Hz, 1H), 4.12 (m, 1H) 2H), 3.09-3.05 (d , J = 8 Hz), 4.02-4.06 (m, 1H), 3.70-3.80 (m, 3H) 16.0 Hz, 1H), 2.79-2.83 (d , J = 16.0 Hz, 1H), 1.47 (s, 6H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

3-methyl-butanoic acid (compound AP (5-a) pyrazin-2-yl] )

(Compound AP-1) was used instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt to obtain Compound Q of Example 19 , The title compound was prepared.

Preparation of methyl 3-amino-3-methyl-butaneoate hydrochloride salt (compound AP-1)

Compound AP-1 was prepared similarly to compound 20 of Example 20 using 3-amino-3-methyl-butyric acid instead of DL-3-aminoisobutyric acid.

Example 34

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carbonic acid

3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] -2,2-dimethyl- (Compound Q) instead of 3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- -Butanoic acid (compound AP), the title compound was prepared in analogy to example 19. &lt; RTI ID = 0.0 &gt; Example 34 (26 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.99-8.00 (d} , J = 4.0 Hz, 1H), 7.83- 7.84 (d, J = 4.0 Hz, 1H), 7.35 (m, 2H), 7.20 2H), 3.94 (m, 2H), 3.70 (m, 2H), 3.29 (m, 5H) 3.02-3.06 (d, J = 16.0 Hz , 1H), 2.80-2.84 (d, J = 16.0 Hz, 1H), 1.46 (s, 6H), 1.11-1.15 (t, J 1 = 8.0 Hz, J 2 = 16.0 Hz, 3H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

Example 35

1 - [[(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid

Chloro-3-fluorobenzaldehyde, ethyl acetoacetate and ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt in place of 2-chloro-4-fluorobenzaldehyde, The title compound was prepared in analogy to example 19 using methyl 1- (aminomethyl) cyclopropanecarboxylate hydrochloride salt (compound AQ). Example 35 (760 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.01 (d} , J = 4.0 Hz, 1H), 7.90-7.91 (d, J = 4.0 Hz, 1H), 7.55 (m, 1H), 7.29 (m, 1H), 7.13 ( m, 1H), 6.20 (s, 1H), 4.77 (d, J = 16.0 Hz, 1H), 4.59 (d, J = 16.0 Hz, 1H), 4.19 (m, 1H) 3H), 3.36-3.50 (m, 4H), 3.15-3.24 (m, 2H), 1.29 (m, 2H) ), 1.02 (m, 2H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Preparation of methyl 1- (aminomethyl) cyclopropanecarboxylate hydrochloride salt (Compound AQ)

(Mertin A., et al., Synlett ) for the synthesis of 1- (aminomethyl) cyclopropanecarboxylic acid (CAS number: 139132-50-6, J & K) instead of DL-3-aminoisobutyric acid , 1991, 2, 87-9), the title compound was prepared.

Example 36

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4 -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid

The title compound was prepared in analogy to example 19 using methyl 1- (aminomethyl) cyclopropanecarboxylate hydrochloride salt (compound AQ) instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt . Example 36 (170 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.01 (d} , J = 4.0 Hz, 1H), 7.92-7.91 (d, J = 4.0 Hz, 1H), 7.38 (m, 2H), 7.26 (m, 1H), 6.27 ( s, 1H), 4.77 (d, J = 16.0 Hz, 1H), 4.59 (d, J = 16.0 Hz, 1H), 4.11 (m, 1H), 4.07-4.10 (m, 2H), 1.29 (m, 2H), 1.13 (t, J ₁ = 8.0 Hz, J ₂ = 16.0 Hz, 3H), 1.02 (m, 2H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Example 37

1 - [[(8aS) -7 - [[(4S) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2- yl] methyl] cyclopropanecarboxylic acid

2-chloro-3-fluorobenzaldehyde, ethyl acetoacetate and 3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazine Methyl-3,4-difluorobenzaldehyde, methyl acetoacetate and 3 - [(8aS) -3-oxo-pyridin- The title compound was prepared in analogy to example 19, using 1, 5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] Lt; / RTI &gt; Example 37 (153 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.01 (d} , J = 4.0 Hz, 1H), 7.90-7.91 (d, J = 4.0 Hz, 1H), 7.26 (m, 1H), 7.10 (m, 1H), 5.95 ( s, 1H), 4.74 (d, J = 16.0 Hz, 1H), 4.57 (d, J = 16.0 Hz, 1H), 4.10 (m, 2H), 3.70-3.80 (m, 3H), 3.66 (s, 3H ), 3.36-3.42 (m, 2H), 3.20 (m, 2H), 3.09-3.05 (d, J = 16.0 Hz, 1H), 2.79-2.83 (d, J = 16.0 Hz , &Lt; / RTI &gt; 1H), 2.53 (s, 3H), 1.47 (s, 6H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 38

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-benzothiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopropanecarboxylic acid

The title compound was prepared in analogy to example 35 using 2-methyl-3,4-difluorobenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde. Example 38 (54 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.01 (d} , J = 4.0 Hz, 1H), 7.90-7.91 (d, J = 4.0 Hz, 1H), 7.26 (m, 1H), 7.12 (m, 1H), 5.95 (s, 1H), 4.74 (d , J = 16.0 Hz, 1H), 4.56 (d , J = 16.0 Hz, 1H), 4.07-4.17 2H), 1.02 (m, 2H), 2.50 (s, 3H), 3.69 (m, 2H) . MS: Calcd. 601 (MH ⁺ ), Measurement 601 (MH ⁺ ).

Example 39

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1, 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2- yl] cyclobutanecarboxylic acid

Chloro-3-fluorobenzaldehyde, ethyl acetoacetate and ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride instead of 2-chloro-4-fluorobenzaldehyde, Trans - 3-amino-cyclobutanecarboxylate hydrochloride (CAS number: 74316-29-3; see Grygorenko OO, et al., Synthetic Communications, 2011, 41 , 1644-1649 for its synthesis) The title compound was prepared in analogy to example 19. &lt; RTI ID = 0.0 &gt; Example 39 (44 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (dd} , J = 4.0, 3.3 Hz, 1H), 7.77 (dd, J = 3.1, 1.4 Hz, 1H), 7.43 (ddd, J = 8.7, 1H), 4.19 (dd , J = 16.9, &lt; RTI ID = 0.0 &gt; (M, 3H), 2.82-3.28 (m, 5H), 2.74 (d , J = 11.8Hz, 1H), 2.15-2.65ppm (m, 6H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 40

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] cyclobutanecarboxylic acid

Chloro-3-fluorobenzaldehyde, ethyl acetoacetate and ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride instead of 2-chloro-4-fluorobenzaldehyde, Cis - 3-amino-cyclobutanecarboxylate hydrochloride (CAS number: 1212304-86-3; see Grygorenko OO, et al., Synthetic Communications, 2011, 41 , 1644-1649 for its synthesis) The title compound was prepared in analogy to example 19. &lt; RTI ID = 0.0 &gt; Example 40 (5 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.92-8.02 (m} , 1H), 7.77 (dd, J = 3.1, 1.4 Hz, 1H), 7.38-7.48 (m, 1H), 7.24 (d, 1H, J = 6.3 Hz, 1H), 6.98-7.15 (m, IH), 6.18 (s, IH), 4.58-4.75 (m, , 3.61 (s, 4H), 2.81-3.27 (m, 6H), 2.33-2.63 ppm (m, 5H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 41

3-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid

The title compound was prepared in analogy to example 19 using methyl acetoacetate instead of ethyl acetoacetate. Example 41 (250 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.09-7.36 (m, 3H), 6.23 (s 2H), 2.76-2.99 (m, 3H), 3.46-3.55 (m, 3H) (m, 2H), 2.12 - 2.45 (m, 2H), 1.15 - 1.25 ppm (m, 6H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 42

4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid

The title compound was prepared in analogy to example 19 using 2-chloro-4-fluorobenzaldehyde and methyl acetoacetate instead of 2-chloro-3-fluorobenzaldehyde and ethyl acetoacetate. Example 42 (260 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.42 (dd, J = 8.5, 6.0 Hz, 1H ), 7.24 (dd, J = 8.7, 2.6 Hz, 1H), 7.06 (td, J = 8.4, 2.8 Hz, 1H), 6.17 (s, 1H), 4.09 (d, J = 16.8 Hz, 1H), 3.79 (M, 3H), 3.61 (s, 3H), 3.51 (t , J = 8.9 Hz, 1H), 3.36-3.44 , 2H), 2.11-2.43 (m, 2H), 1.20 ppm (d , J = 3.0 Hz, 6H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 43

Methyl-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-1 - [(4-fluoro- , 4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2-dimethyl-propanoic acid

The title compound was prepared in analogy to example 19 using 2-methyl-3,4-difluorobenzaldehyde and methyl acetoacetate instead of 2-chloro-3-fluorobenzaldehyde and ethyl acetoacetate. Example 43 (110 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.3 Hz, 1H), 7.75 (d, J = 3.3 Hz, 1H), 6.96-7.09 (m, 2H), 5.93 (s 2H), 2.74-2.97 (m, 3H), 3.64-3.56 (m, 3H) (m, 2H), 2.57 ( d, J = 2.3 Hz, 3H), 2.36 (td, J = 11.7, 3.6 Hz, 1H), 2.18 (t, J = 10.9 Hz, 1H), 1.20 ppm (d, J = 3.3 Hz, 6H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 44

3 - [(8aS) -7 - [[(4S) -4- (3-fluoro- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid

The title compound was prepared in analogy to example 19 using 2-methyl-3-fluorobenzaldehyde and methyl acetoacetate instead of 2-chloro-3-fluorobenzaldehyde and ethyl acetoacetate. Example 44 (74 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.0 Hz, 1H), 7.74 (d, J = 3.3 Hz, 1H), 7.03-7.21 (m, 2H), 6.88-6.99 (s, 3H), 3.41-3.56 (m, 2H), 3.07-3.26 (m, IH) (m, 2H), 2.75-2.98 ( m, 2H), 2.53 (d, J = 2.0 Hz, 3H), 2.29-2.45 (m, 1H), 2.18 (t, J = 11.2 Hz, 1H), 1.20 ppm (d , J = 3.3 Hz, 6H). MS: Calculated 585 (MH ^&lt; ⁺ & gt ^; ), found 585 (MH ^&lt; ⁺ & gt ^; ).

Example 45

Phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-l, 4-dihydropyrimidin-6- Methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-

Preparation of Example 45

To a solution of methyl 7 - [[(4R) -4- (2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine- (Compound AQ, 150 mg, 0.25 mmol) in THF (5 mL) was added lithium hydroxide monohydrate (52 mg, 1.25 mmol) in water (1.5 mL). The reaction mixture was stirred at room temperature for 2 hours, then it was neutralized to pH 3.0 with 1 N hydrochloride solution. The mixture was extracted three times with ethyl acetate (30 mL). The combined organic phases were dried with Na ₂ SO ₄ and concentrated after filtration. The residue was purified by prep-HPLC to give Example 45 (5 mg) as a mixture of two diastereomers. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.06-7.95 (m} , 1H), 7.87 (s, 1H), 7.55-7.44 (m, 1H), 7.32-7.23 (m, 1H), 7.15- 2H), 3.62 (d , J = 2.0 Hz, 1H), 7.03 (m, 1H), 6.18 (s, J = 1.5 Hz, 4H), 3.52-3.39 (m, 2H), 3.22-2.96 (m, 2H), 2.75-2.58 (m, . MS: Calculated 589 (MH ^&lt; ⁺ & gt ^; ), found 589 (MH ^&lt; ⁺ & gt ^; ).

Phenyl) -5-methoxycarbonyl-2-thiazol-2-yl-l, 4-dihydropyrimidin-6- Methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylate (Compound AQ)

(Compound D) instead of methyl 2-cyclopropyl-3-oxo-1,5,6,7,8, 8a -Hexahydroimidazo [l, 5-a] pyrazine-8-carboxylate (compound AR), the title compound was prepared in analogy to example 1.

Preparation of cis-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (compound AR)

Step 1: To a solution of dimethyl maleate (7.2 g, 50 mmol) in tetrachloromethane (150 mL) was added bromine (8.8 g, 55 mmol) in tetrachloromethane (10 mL) . The reaction mixture was stirred overnight at 0 &lt; 0 &gt; C. The reaction mixture was quenched by the addition of ice-water and washed with Na ₂ SO ₃ solution. The organic phase was washed with water, separated and concentrated after drying with Na ₂ SO ₄ to give a crude compound AS (15.2 g).

Step 2: To a solution of compound AS (10.6 g, 35 mmol) in benzene (120 mL) was added N, N -dibenzylethylenediamine (8.4 g, 35 mmol) in benzene Triethylamine (9.7, 70 mmol) was added dropwise. The reaction mixture was stirred for 10 minutes and heated to reflux overnight. The reaction mixture was cooled by addition of ice-water petroleum ether: ethyl acetate = 10: 1 and extracted three times with 1 (50 mL) and dry the combined organic phases with Na ₂ SO ₄ and concentrated after filtration. The residue was purified by column chromatography to obtain compound AT (3.3 g).

Step 3: To a solution of compound AT (4.5 g, 11.8 mmol) in THF (60 mL) was added di- t- butyl dicarbonate and palladium hydroxide on carbon (1.0 g). The reaction mixture was heated to 45 &lt; 0 &gt; C overnight under hydrogen atmospheric pressure. The reaction mixture was filtered and concentrated. The residue was purified by column chromatography to obtain Compound AU (3.6 g).

Step 4: To a solution of compound AU (760 mg, 1.89 mmol) in methanol (4.0 mL) at 55 <0> C was added dropwise sodium hydroxide (98 mg, 2.46 mmol) in water (1 mL). The reaction mixture was stirred at 55 &lt; 0 &gt; C for 2 hours. The reaction mixture was cooled, neutralized to pH 3.0 and extracted three times with ethyl acetate (30 mL). The combined organic phases were dried over Na ₂ SO ₄ , filtered and concentrated to give crude compound AV (660 mg).

Step 5: To a solution of compound AV (776 mg, 2.0 mmol) in dichloromethane (8.0 mL) was added cyclopropylamine (120 mg, 2.0 mmol), HATU (950 mg, 2.5 mmol) and diisopropylethylamine mL). The reaction mixture was stirred overnight at room temperature. The reaction mixture was quenched by the addition of ice water and extracted three times with dichloromethane (30 mL). The combined organic phases were dried over Na ₂ SO ₄ , filtered and concentrated to give crude Compound AW (578 mg).

Step 6: To a mixture of phenyl silane (1.5 mL) and [Ir (COD) ₂ Cl] ₂ (7 mg, 0.01 mmol) in dichloromethane (1.5 mL) was added compound AW (128 mg, 2.0 mmol). The reaction mixture was stirred overnight at 40 &lt; 0 &gt; C. The reaction mixture was concentrated and then diluted with dichloromethane (20 mL) and quenched by addition of hydrochloride (3 drops) in dioxane solution (3 N). The reaction mixture was washed with water. The organic phase was separated, dried over Na ₂ SO ₄ , filtered and concentrated. The residue was purified by column chromatography to give crude Compound AX (70 mg).

Step 7: To a solution of compound AX (72 mg, 0.174 mmol) in dichloromethane (2.0 mL) was added 4-nitrophenyl chloroformate (70 mg, 0.35 mmol) and diisopropylethylamine (5 drops). The reaction mixture was heated to 40 &lt; 0 &gt; C for 2 h, then it was concentrated and the residue was purified by column chromatography to give 81 mg of compound AY.

Step 8: A mixture of compound AY (578 mg, 1.0 mmol) and TFA: DCM = 2: 1 (9 mL) was stirred at room temperature for 2 hours. The reaction mixture was concentrated and toluene was added to remove the trifluoroacetic acid for simultaneous evaporation. The residue was dissolved in dichloromethane (8.0 mL) and diisopropylethylamine (2 mL) was added. The reaction mixture was heated to 40 &lt; 0 &gt; C for 3 h. The reaction mixture was concentrated to give compound AR (239 mg, crude).

Example 46

2 - [(4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Acetic acid

Preparation of Example 46

(8aS) -3-oxo-1,5,6,7,8-tetrahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1 using 8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] butanoic acid (compound 46-A). Example 46 (65 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.42 (dd, J = 6.1, 8.7 Hz, 1H ), 7.24 (dd , J = 2.8,8.8 Hz, 1H), 7.05 (dt , J = 2.5,8.4 Hz, 1H), 6.17 (s, 1H), 4.15-4.02 (m, 1H), 3.96-3.71 m, 3H), 3.66-3.53 (m , 4H), 3.22-3.07 (m, 2H), 2.90 (d, J = 11.0 Hz, 1H), 2.80 (d, J = 9.0 Hz, 1H), 2.68-2.56 (m, 1H), 2.55-2.46 (m, 1H), 2.37 (dt , J = 3.1,11.6Hz, 1H), 2.18 (t , J = 10.9Hz, 1H), 1.03-0.81 MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Preparation of 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] butanoic acid (Compound 46-

Step 1: dichloromethane (3 mL) and Et ₃ N (0.5 mL) of t- butyl (3S) -3- formaldehyde-4-yl-piperazine-1-carboxylate (Compound S, 346 mg, 1 mmol) was added to 4-aminobutanoic acid (103 mg, 1 mmol). The reaction mixture was stirred at room temperature for 1 hour and then concentrated under reduced pressure. Methanol (5 mL) and sodium cyanoborohydride (248 mg, 4 mmol) were then added and the reaction mixture was stirred for an additional 3 hours at room temperature. The mixture was concentrated under reduced pressure to give crude Compound 46-B.

Step 2: Compound 46-B in THF (10 mL) was added to potassium t- butoxide (224 mg, 2 mmol) and the reaction mixture was stirred at 80 <0> C for 4 hours. The solution was cooled to room temperature and acidified to pH 5 with aqueous HCl solution. The mixture was then extracted three times with ethyl acetate. The combined organic layers were washed with brine, dried over Na ₂ SO ₄ and concentrated under reduced pressure to give crude compound 46-C (301 mg).

Step 3: A stirred solution of 46-C (301 mg, 0.92 mmol) was dissolved in dichloromethane (4 mL) and treated with trifluoroacetic acid (2 mL) at room temperature. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give 4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ a] pyrazin-2-yl] butanoic acid (Compound 46-A) was obtained and used directly.

Example 47

2 - [(4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Acetic acid

Preparation of Example 47

(Compound D) instead of 2- [1 - [(8aR) -3-oxo-1,5,6,7-hexahydro-pyrazino [ , 8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] cyclopropyl] acetic acid (Compound 47-A). Example 47 (62 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.42 (dd, J = 6.1, 8.7 Hz, 1H ), 7.24 (dd , J = 2.8,8.8 Hz, 1H), 7.05 (dt , J = 2.5,8.4 Hz, 1H), 6.17 (s, 1H), 4.15-4.02 (m, 1H), 3.96-3.71 m, 3H), 3.66-3.53 (m , 4H), 3.22-3.07 (m, 2H), 2.90 (d, J = 11.0 Hz, 1H), 2.80 (d, J = 9.0 Hz, 1H), 2.68-2.56 (m, 1H), 2.55-2.46 (m, 1H), 2.37 (dt , J = 3.1, 11.6 Hz, 1H), 2.18 (t , J = 10.9 Hz, 1H), 1.03-0.81 (m, 4H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

2- [1 - [(8aR) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2 yl] cyclopropyl] acetic acid (Compound 47- A)

Methyl-2- (1-aminocyclopropyl) acetate hydrochloride salt (for the synthesis of which is described in Sandstroem A., et al., Bioorganic &Lt; / RTI &gt; &amp; Medicinal Chemistry, 16 (10), 5590-5605; 2008).

Example 48

2- [l- [(8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Acetic acid

Preparation of Example 48

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( compound (4R) -6- (bromomethyl) -4- (2-cyanomethyl-phenyl) (Compound C-1) and 2- [1 - [(8aR) -3, 4-dihydro-pyridin- -Acetic acid (Compound 47-A) was used in analogy to Example 1 to yield the title compound as a white solid, MS (ISP): m / e = The title compound was prepared. Example 48 (76 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (s} , 1H), 7.76 (s, 1H), 7.37-7.23 (m, 2H), 7.21-7.10 (m, 1H), 6.24 (s, 1H), 4.04 (d , J = 7.0 Hz, 3H), 3.95-3.77 (m, 3H), 3.66-3.54 (m, , 2.86-2.74 (m, 1H), 2.67-2.57 (m, 1H), 2.55-2.45 (m, 1H), 2.42-2.30 (m, 1H), 2.23-2.12 (m, 1H), 1.13 (t, J = 7.2 Hz, 3H), 1.01-0.81 (m, 4H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-5-carboxylate (Compound C-1)

Compound C-1 was prepared similarly to compound C using ethylacetoacetate and 2-chloro-3-fluorobenzaldehyde instead of methyl acetoacetate and 2-chloro-4-fluorobenzaldehyde.

Example 49

(2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid

Preparation of Example 49

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ 2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound C-1) and (1R, 2R) -2- [ (Compound 49-A), the title compound was obtained as colorless crystals from Example &lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt; the title compound was prepared. Example 49 (48 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.27 (s, 2H), 7.21-7.12 (m 2H), 3.83-3.75 (m, 1H), 3.59 (m, 2H), 3.74-3.86 (m, 1H), 2.45-2.35 (m, 1 H), 2.29-2.15 (m, 1H), 2.11-1.84 (m, 3H), 1.82-1.68 (m, 3H), 1.13 (t, J = 7.2 Hz, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

(1R, 2R) -2 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2- yl] cyclopentanecarboxylic acid Preparation of compound 49-A)

(1R, 2R) -2-aminocyclopentanecarboxylate (Accela Chembio Co., Ltd.) Instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt, Compound 49-A was prepared similarly to Compound Q of Example 19 using the compound of Example 19 (SY024586).

Example 50

(2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid

Preparation of Example 50

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ 2-yl-l, 4-dihydropyrimidine-5-carboxylate (Compound C-1) and (lS, 2R) -2- [ (Compound 50-A), the title compound was obtained as colorless crystals from Example &lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt; the title compound was prepared. Example 50 (30 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 6.97-7.39 (m, 2H), 6.24 (s (M, 2H), 4.42 (d , J = 9.8 Hz, 2H), 3.73-4.19 (m, 5H), 3.52 (m, 4H), 3.12-3.23 2.11-2.47 (m, 3H), 1.60-2.05 (m, 4H), 1.13 ppm (t , J = 7.2 Hz, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

(1S, 2R) -2 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2- yl] cyclopentanecarboxylic acid Preparation of compound 50-A)

Using ethyl (1S, 2R) -2-aminocyclopentanecarboxylate trifluoroacetic acid salt (Compound 50-B) instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt, Compound 50-A was prepared similarly to compound Q of 19.

Preparation of ethyl (1S, 2R) -2-aminocyclopentanecarboxylate trifluoroacetic acid salt (Compound 50-B)

(1 R, 2 S) -2- (Boc- amino) cyclopentane carboxylate (CAS: 1140972-29-7, TCI) TFA to (1 mmol) at 0 ℃ was dissolved in CH ₂ Cl ₂ (3 mL) (1 mL) was slowly added. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give crude product 50-B which was used directly in the next step.

Example 51

(2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylate

Preparation of Example 51

(1R, 2S) -2 - [(8aS) -3-oxo-1, 5-dihydro-pyrazino [ The title compound was prepared in analogy to example 1 using 6,7,8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] cyclopentanecarboxylic acid TFA salt (compound 51- . Example 51 (68 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.07-7.89 (m} , 1H), 7.78 (d, J = 3.0 Hz, 1H), 7.44 (t, J = 6.9 Hz, 1H), 7.25 (dd , J = 2.5, 8.8 Hz, 1H), 7.06 (dt, J = 2.5, 8.4 Hz, 1H), 6.18 (s, 1H), 4.41 (q, J = 8.6 Hz, 1H), 4.19 (d, J = J = 4.3, 9.0 Hz, 1 H), 2.99 (br, IH), 3.85-3.57 (m, (s, 1H), 2.94-2.77 (m, 2H), 2.48 (br.s, 1H), 2.29 (br.s, 1H), 2.08-1.84 (m, 3H), 1.84-1.69 , 3H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

(1R, 2S) -2 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- 2- yl] cyclopentanecarboxylic acid TFA Preparation of salt (Compound 51-A)

Ethyl (1R, 2S) -2-aminocyclopentanecarboxylate (Acell Chembio Campanilite, CAS: 197916-36-2) was used instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt. , Compound 51-A was prepared similarly to Compound Q of Example 19.

Example 52

(2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Cyclopentanecarboxylic acid

Preparation of Example 52

(1S, 2S) -2 - [(8aS) -3-oxo-l, 5-dihydroxy-pyrazino [ The title compound was prepared in analogy to example 1 using 6,7,8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] cyclopentanecarboxylic acid TFA salt (Compound 52- . Example 52 (1.7 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol ^{_{-d 4) d ppm 1 H NMR}} (MeOD, 400MHz) d = 7.97 (d, J = 3.0 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.42 ( (dd , J = 6.0,8.8 Hz, 1H), 7.24 (dd , J = 2.8,8.8 Hz, 1H), 7.06 (dt , J = 2.8,8.4 Hz, 1H), 6.18 (m, 1H), 4.09 ( d, J = 17.1 Hz, 1H), 3.98-3.72 (m, 3H), 3.61 (s, 3H), 3.52 (t, J = 8.9 Hz, 1H), 3.26-3.01 ( m, 2H), 2.96-2.72 (m, 3H), 2.41-2.17 (m, 2H), 2.05-1.84 (m, 3H), 1.81-1.67 (m, 3H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

(1S, 2S) -2 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- 2- yl] cyclopentanecarboxylic acid TFA Preparation of salt (Compound 52-A)

Ethyl (1S, 2S) -2-aminocyclopentanecarboxylate (Acellar Chembio Campanilite, CAS: 752181-59-2) was used instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt. , Compound 52-A was prepared similarly to Compound Q of Example 19.

Example 53

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-

Preparation of Example 53

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 4 - [(8aS) -3-oxo-thiophene-2- -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] butanoic acid (Compound 46-A) . Example 53 (2 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.27 (s, 2H), 7.16 (s, 1H ), 6.24 (s, 1H), 4.18-4.01 (m, 3H), 3.92 (d , J = 16.8 Hz, 3H), 3.49 m, 2H), 3.12-3.04 (m , 1H), 2.97-2.81 (m, 2H), 2.33 (s, 3H), 2.26-2.14 (m, 1H), 1.85 (d, J = 7.0 Hz, 2H) , 1.13 (t , J = 7.2 Hz, 3 H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 54

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid

Preparation of Example 54

(8aS) -3-oxo-1,5,6,7,8-tetrahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1, using 8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] -2,2- dimethyl-butanoic acid TFA salt (compound 54- Respectively. Example 54 (23 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.01 (d} , J = 3.0 Hz, 1H), 7.90 (d, J = 3.0 Hz, 1H), 7.53 (dd, J = 5.9, 8.7 Hz, 1H ), 7.29 (dd , J = 2.6,8.7 Hz, 1H), 7.17-7.06 (m, 1H), 6.20 (s, IH), 4.77-4.64 (m, IH), 4.57-4.42 4.27-4.12 (m, 1H), 4.07 (dd, J = 3.3, 14.8 Hz, 1H), 3.75-3.62 (m, 5H), 3.58 (t, J = 9.0 Hz, 1H), 3.51-3.37 (m, 2H), 3.27-3.02 (m, 4H), 1.95-1.82 (m, 1H), 1.80-1.66 (m, 1H), 1.31-1.19 (m, 6H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] -2,2-dimethyl- Preparation of TFA salt (Compound 54-A)

Step 1: A mixture of 2,2-dimethylbutyrolactone (6.84 g, 60 mmol) and KOH (3.36 g) in H ₂ O (60 mL) was heated to reflux for 2 hours. The solution was cooled to room temperature and acidified to pH 5 with aqueous HCl solution. The mixture was then extracted three times with ethyl acetate. To give a butanoic acid compound 54-B (4 g) - The combined organic layers were washed with brine, Na ₂ SO ₄ dried, and concentrated under reduced pressure to give 4-hydroxy-2,2-dimethyl.

Step 2: To a mixture of compound 54-B (2.2 g, 16.6 mmol) in ethyl ether (16 mL) and methanol (24 mL) at 0 C was added a hexane solution of trimethylsilyldiazomethane (12.5 mL, 25 mmol) 2.0 M). The reaction mixture was stirred at 0 &lt; 0 &gt; C for 1 hour. Taken during the solvent was evaporated, and the residue was ethyl acetate and washed successively with a diluted aqueous solution of HCl, saturated NaHCO ₃ solution and brine. To afford the butyric acid methyl ester 54-C (1.5 g) - The mixture is dried over Na ₂ SO _4, and concentrated to give 4-hydroxy-2,2-dimethyl.

Step 3: To a solution of the alcohol in THF (4 mL) at 0 & The 54-C (45 mg, 0.34 mmol) Ph 3 P (136 mg, 0.52 mmol), imidazole (71 mg, 1.04 mmol) and _{I 2 (132 mg, 0.52 mmol} ) was added to a solution of. After 1 h, the reaction mixture was quenched with saturated Na ₂ S ₂ O ₃ solution. The aqueous layer was extracted twice with hexane. The organic layer was dried with Na ₂ SO ₄ and concentrated in vacuo to afford the compound 54-D as a crude product.

Step 4: NaH (48 mg, 2 mmol) was added at room temperature to a stirred solution of compound M (256 mg, 1 mmol) in DMF (2 mL). After the reaction mixture was stirred at room temperature for 20 minutes, compound 54-D (256 mg, 1 mmol) was added. The reaction mixture was stirred at room temperature for 4 hours, then EA was added and the mixture was washed with water and brine. The mixture was dried over Na ₂ SO ₄ and concentrated under reduced pressure to give a crude product which was purified by column to give 150 mg of compound 54-E.

Step 5: LiOH (96 mg, 2.4 mmol) was added to a stirred solution of compound 54-E (150 mg, 0.4 mmol) in THF (5 mL) and water (2 mL). The reaction mixture was stirred at 80 &lt; 0 &gt; C for 18 h, then it was concentrated under reduced pressure to give a crude product which was dissolved in DCM (4 mL) and treated with TFA (4 mL). The mixture was stirred at room temperature for 2 hours and then concentrated under reduced pressure to give crude product 54-A which was used directly.

Example 55

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid

Preparation of Example 55

(8aS) -3-oxo-1,5,6,7,8-tetrahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1 using 8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] -3,3-dimethyl-butanoic acid TFA salt (compound 55- Respectively. Example 55 (22 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.50-7.35 (m, 1H), 7.29-7.20 (s, 3H), 3.61 (s, 4H), 3.19 (d , J) = 14.6 Hz, 3H), 3.08-2.99 (m, 1H), 2.97-2.82 (m, 2H), 2.47-2.34 (m, 1H), 2.27 (s, 3H), 1.07 (s, 6H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

4 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] -3,3-dimethyl- Preparation of TFA salt (Compound 55-A)

Step 1: 4,4-Dimethyl-2-pyrrolidinone (2.52 g, 22.3 mmol) was added to a mixture of concentrated HCl (50 mL) and water (50 mL) Lt; / RTI &gt; After cooling to room temperature, the mixture was washed twice with dichloromethane. The aqueous layer was evaporated to give 4-amino-3,3-dimethyl-butyric acid hydrochloride compound 55-B (3.4 g) as a white solid.

Step 2: Aldehyde S (346 mg, 1 mmol) in dichloromethane (3 mL) and Et ₃ N (0.5 mL) was added to compound 55-B (131 mg, 1 mmol). The reaction mixture was stirred at room temperature for 1 hour and then concentrated under reduced pressure. Methanol (5 mL) was added followed by sodium cyanoborohydride (248 mg, 4 mmol). The reaction mixture was stirred at room temperature for 1 hour and then concentrated under reduced pressure to give the crude product 55-C.

Step 3: Compound 55-C in THF (10 mL) was added to potassium t-butoxide (224 mg, 2 mmol) and the reaction mixture was stirred at 80 &lt; 0 &gt; C for 4 h. The solution was cooled to room temperature and acidified to pH 5 with aqueous HCl solution. The mixture was then extracted three times with ethyl acetate. The combined organic layers were washed with brine, dried over Na ₂ SO ₄ and concentrated under reduced pressure to give the crude product 55-D.

Step 4: Trifluoroacetic acid (2 mL) was added at room temperature to a stirred solution of compound 55-D (301 mg, 0.92 mmol) in dichloromethane (4 mL). The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give crude product 55-A which was used directly.

Example 56

(2-carboxy-ethyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin-7-ylmethyl] -4- (2- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid ethyl ester

Preparation of Example 56

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 3 - [(8aS) -3-oxo-thiophene-2- -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] propanoic acid TFA salt (Compound 56-A) Lt; / RTI &gt; Example 56 (60 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95-8.00 (m} , 1H), 7.79 (d, 1H), 7.25-7.36 (m, 2H), 7.12-7.22 (m, 1H), 6.25 ( 2H), 3.24 (m, 2H), 3.36-3.50 (m, 1H), 3.24 (m, 1H), 3.15 (m, 1H), 3.04 (d, 2H), 2.56 (m, 3H), 2.40 (br. MS: Calculated 591 (MH ^&lt; ⁺ & gt ^; ), found 591 (MH ^&lt; ⁺ & gt ^; ).

A] pyrazin-2-yl] propanoic acid TFA salt (Compound 56-A) Manufacturing

Step 1: To a stirred solution of compound M (150 mg, 0.62 mmol) in THF (3 mL) at room temperature was added methyl acrylate (534 mg, 6.20 mmol) followed by the addition of a small amount of NaOH as catalyst. LC-MS shows that compound M was completely consumed and product 56-B was already formed. The resulting mixture was stirred at room temperature for 6 hours. The reaction mixture was then concentrated and used directly in the next step without further purification. The amount of the crude product was 180 mg.

Step 2: To a solution of compound 56-B (180 mg, 0.55 mmol) in THF (3 mL) was added a solution of lithium hydroxide monohydrate (116 mg, 2.75 mmol) in H ₂ O Respectively. The resulting mixture was stirred at room temperature for 3 hours. LC-MS shows complete consumption of starting material 56-B. The mixture was adjusted to pH 4-5 with 1 N HCI and then concentrated. The residue was used directly in the next step and the amount of crude product 56-C was 300 mg.

Step 3: To a solution of compound 56-C (crude, 300 mg, 0.55 mmol) in dichloromethane (3 mL) was added trifluoroacetic acid (3 mL) at room temperature. The resulting mixture was stirred at room temperature for 2 hours. The reaction mixture was concentrated and the residue was used directly in the next step. The amount of crude product 56-A was 350 mg.

Example 57

Methyl-ethyl) -3-oxo-hexahydro-imidazo [1,5-a] pyrazin-7-yl Methyl-4- (2-chloro-3-fluoro-phenyl) -2-thiazol-

Preparation of Example 57

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and (3R) -3 - [(8aS) -2-thiazol-2-yl-1,4-dihydropyrimidine- 1-yl) butanoic acid TFA salt (Compound 57-A) was used instead of 3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- , The title compound was prepared. Example 57 (48 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.02 (d} , 1H), 7.91 (d, 1H), 7.33-7.41 (m, 2H), 7.21 to 7.29 (m, 1H), 6.27 (s, 4H), 3.60-3.74 (m, 3H), 3.38-3.48 (m, 1H), 4.72 (d, 1H), 1.27 (d, 3H), 1.13 (m, 3H), 3.04-3.25 (m, 3H), 2.56-2.66 (m, MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

(3R) -3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] butanoic acid TFA salt 57-A)

(Compound 57-B) was used in place of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt to obtain the compound Q of Example 19 and (2R) -3-aminobutyrate hydrochloride salt Compound 57-A was similarly prepared.

Preparation of methyl (3R) -3-aminobutaneoate hydrochloride salt (Compound 57-B)

Compound 57-B was prepared similarly to compound 20 of Example 20 using (R) -3-aminobutanoic acid instead of DL-3-aminoisobutyric acid.

Example 58

Methyl-ethyl) -3-oxo-hexahydro-imidazo [1,5-a] pyrazin-7-yl Methyl-4- (2-chloro-3-fluoro-phenyl) -2-thiazol-

Preparation of Example 58

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and (3S) -3 - [(8aS) -2-thiazol- 1-yl) butanoic acid TFA salt (Compound 58-A) was used instead of 3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ , The title compound was prepared. Example 58 (50 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.01 (d} , 1H), 7.90 (d, 1H), 7.33-7.40 (m, 2H), 7.21 to 7.28 (m, 1H), 6.27 (s, 1H), 4.66 (d, 1H), 4.49 (d, 1H), 4.34-4.42 (m, 2H), 1.23 (d, 3H), 1.13 (m, 3H), 3.42-3.50 (m, . MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

(3S) -3 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] butanoic acid TFA salt 58-A)

(Compound 58-B) was used in place of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt to give Compound Q of Example 19 and (2S) -3-aminobutyrate hydrochloride salt Compound 58-A was similarly prepared.

Preparation of methyl (3R) -3-aminobutaneoate hydrochloride salt (Compound 58-B)

Compound 58-B was prepared similarly to compound 20 of Example 20 using (S) -3-aminobutanoic acid instead of DL-3-aminoisobutyric acid.

Example 59

(R) -6 - [(S) -2- (1-carboxy-cyclobutylmethyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin- Chloro-4-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-

Preparation of Example 59

([(8aS) -3-oxo-l, 5,6,7,8,8-hexahydro-pyrazino [1,2- c] [1,3] oxazin- , 8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] methyl] cyclobutanecarboxylic acid TFA salt (Compound 59-A). Example 59 (15 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , 1H), 7.76 (d, 1H), 7.42 (m, 1H), 7.24 (m, 1H), 7.06 (m, 1H), 6.17 (m, IH), 3.61 (s, 3H), 3.54 (d, IH) ), 3.47 (m, IH), 3.14-3.23 (m, IH), 3.05 (m, IH), 2.90 2.39 (m, 1H), 2.16 (m, 1H), 1.99-2.09 (m, 3H), 1.89-1. MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Yl] methyl] cyclobutanecarboxylic acid TFA salt (compound (1)) was obtained in the same manner as in Synthesis Example 1, except that 1 - [[(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- 59-A)

1-Aminomethyl-cyclobutanecarboxylic acid ethyl ester (for its synthesis, PCT international application, such as Cao Sheldon X. (2009), supra), in place of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt WO 2009/067547), compound 59-A was prepared similarly to compound Q of Example 19. &lt; RTI ID = 0.0 &gt;

Example 60

Yl) methyl] -4 - ((R) - (S) -2- (1-carboxy-cyclobutylmethyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Chloro-3-fluoro-phenyl) -2-thiazol-2-yl- l, 4-dihydro-pyrimidine-5- carboxylic acid ethyl ester

Preparation of Example 60

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 1 - [[(8aS) -3-fluoro-phenyl) -2-thiazol- Yl] methyl] cyclobutanecarboxylic acid TFA salt (Compound 59-A) was used instead of 2-bromo-5-methylpiperazin-1-ylmethoxy] -1,5,6,7,8,8a-hexahydroimidazo [ , The title compound was prepared. Example 59 (15 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , 1H), 7.76 (d, 1H), 7.23-7.35 (m, 2H), 7.16 (m, 1H), 6.24 (s, 1H) 2H), 3.20 (m, 1H), 3.05 (m, 3H), 3.85-3.77 (m, , 2.92 (d, IH), 2.83 (d, IH), 2.31-2.48 (m, 3H), 2.17 ). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

Example 61 (mixture of two isomers)

(S) -2 - ((1R, 3S) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- ] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester; And

(S) -2 - ((1S, 3R) -3-carboxy-cyclopentyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin- Yl] -l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester

Preparation of Example 61

Hexahydro-pyrazino [1,2-c] [1,3] oxazin-6-one instead of (Compound D) cis - 3 - [(8aS) -3- oxo -1,5,6,7, The title compound was prepared in analogy to example 1 using 8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] cyclopentanecarboxylic acid TFA salt (compound 61-A). Example 61 (30 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (m} , 1H), 7.76 (d, 1H), 7.42 (m, 1H), 7.24 (m, 1H), 7.06 (m, 1H), 6.17 (s, 3H), 3.53 (m, 1H), 3.03-3.23 (m, 1H), 4.24-4.35 , 2H), 2.77-2.93 (m, 3H), 2.36 (m, 1H), 2.04-2.23 (m, 2H), 1.67-2.00 (m, 5H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Cis - A] pyrazin-2-yl] cyclopentanecarboxylic acid TFA salt (Compound 61-A, )

Ethyl 3-amino-2,2-dimethyl-propane-O benzoate hydrochloride salt in place of cis-methyl 3-amino-cyclopentane carboxylate methyl ester hydrochloride salt of the compound of Example 19 using (compound 61-B) Q , &Lt; / RTI &gt;

Cis - Preparation of methyl 3-aminocyclopentanecarboxylate methyl ester hydrochloride salt (Compound 61-B)

Compound 61-B was synthesized similarly to Compound 20 of Example 20, using cis-3-aminocyclopentanecarboxylic acid (Acellar Chembio Campanilite, CAS: 49805-32-5) instead of DL-3-aminoisobutyric acid .

Example 62 (mixture of two isomers)

(S) -2 - ((1R, 3S) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- ] -4- (2-Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester; And

(S) -2 - ((1S, 3R) -3-carboxy-cyclopentyl) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin- Yl] -l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester &lt;

Preparation of Example 62

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ -chloro-3-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylate (compound C-1) and cis-3 - [(8aS) -3 2-yl] cyclopentanecarboxylic acid TFA salt (Compound 61-A) was used as starting material to give the title compound as a white solid. 1H-NMR (DMSO-d6) The title compound was prepared analogously. Example 62 (50 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (m} , 1H), 7.76 (d, 1H), 7.23-7.34 (m, 2H), 7.09-7.19 (m, 1H), 6.24 (s, 1H), 4.23-4.34 (m, 1H), 4.01-4.15 (m, 3H), 3.83-3.95 (m, m, 3H), 2.36 (m, 1H), 2.03-2.22 (m, 2H), 1.90-2.00 (m, 2H), 1.68-1.90 (m, 3H), 1.13 (m, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

Example 63 (mixture of two isomers)

(S) -2 - ((1R, 3R) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [l, 5- a] pyrazin- ] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester; And

(S) -2 - ((1S, 3S) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Yl] -l, 4-dihydro-pyrimidine-5-carboxylic acid methyl ester

Preparation of Example 63

Hexahydro-pyrazino [1,2-c] [1,3] oxazin-6-one (Compound D) in place of trans-3 - [(8aS) -3- oxo -1,5,6,7, The title compound was prepared in analogy to example 1 using 8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] cyclopentanecarboxylic acid TFA salt (compound 63-A). Example 63 (10 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , 1H), 7.76 (d, 1H), 7.42 (m, 1H), 7.24 (m, 1H), 7.06 (m, 1H), 6.17 (s, 3H), 3.49-3.53 (m, IH), 3.18 (d, IH) ), 3.06 (d, 1H), 2.89 (br s, 3H), 2.38 (d, 1H), 2.07-2.19 (m, 3H), 1.86-1.97 (m, 3H), 1.70 (br. , 1H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Trance - A] pyrazin-2-yl] cyclopentanecarboxylic acid TFA salt (Compound 63-A )

Methyl-3-aminocyclopentanecarboxylate methyl ester hydrochloride salt (Compound 63-B) was used instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt to obtain Compound Q To give compound 63-A.

Preparation of trans-methyl 3-aminocyclopentanecarboxylate methyl ester hydrochloride salt (Compound 63-B)

(Allan, Robin D .; Fong, Joyce Australian Journal of Chemistry (1986), 39 (6), 855-64) for the synthesis of trans - 3-aminocyclopentanecarboxylic acid instead of DL-3-aminoisobutyric acid. , &Lt; / RTI &gt; compound 63-B was prepared similarly to compound 20 of Example 20.

Example 64 (mixture of two isomers)

(S) -2 - ((1R, 3R) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [l, 5- a] pyrazin- ] -4- (2-Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester; And

(S) -2 - ((1S, 3S) -3-carboxy-cyclopentyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Yl] -l, 4-dihydro-pyrimidine-5-carboxylic acid ethyl ester &lt;

Preparation of Example 64

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ -chloro-3-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylate (compound C-1) and trans-3 - [(8aS) -3 1-yl) cyclopentanecarboxylic acid TFA salt (Compound 63-A) was used instead of 2-chloro- The title compound was prepared analogously. Example 64 (10 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (m} , 1H), 7.76 (d, 1H), 7.24-7.34 (m, 2H), 7.12-7.19 (m, 1H), 6.24 (s, 1H), 4.34-4.42 (m, 1H), 4.02-4.14 (m, 3H), 3.83-3.94 (m, 1H), 2.82-2.94 (m, 3H), 2.36 (m, 1H), 2.05-2.20 (m, 3H), 1.81-1.98 m, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

Example 65

Ylmethyl] -4- (2-chloro-4- (4-fluoro-benzyl) -imidazo [1,5- a] pyrazin- Fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5- carboxylic acid methyl ester

Preparation of Example 65

(3-oxo-1,5,6,7,8,8a-hexahydro-pyrazino [1,2-c] [1,3] oxazin- Yl) methyl] benzoic acid TFA salt (Compound 65-A), the title compound was prepared in analogy to Example 1. Example 65 (90 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.06 (m} , 3H), 7.91 (m, 1H), 7.53 (m, 1H), 7.40 to 7.45 (m, 2H), 7.30 (m, 1H), 7.08-7.15 (m, IH), 6.20 (d, IH), 4.75 (m, IH), 4.48-4.62 (m, 3H), 4.12-4.25 2H), 3.65 (d, 3H), 3.44-3.58 (m, 2H), 3.16-3.28 (m, 2H), 3.09-3.15 (m, MS: Calculated 639 (MH ^&lt; ⁺ & gt ^; ), Found 639 (MH ^{& lt} ; ⁺ & gt ^; ).

Preparation of 4 - [(3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2- yl) methyl] benzoic acid TFA salt (Compound 65-

Compound 65-A was prepared similarly to compound Q of Example 19 using 4-aminomethyl-benzoic acid methyl ester hydrochloride instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt.

Example 66

Ylmethyl] -4- (2-chloro-3- (4-fluorobenzyl) -3-oxo-hexahydro- Fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydro-pyrimidine-5- carboxylic acid ethyl ester

Preparation of Example 66

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 4 - [(3-oxo-1, 2-dihydro-pyridin- The title compound was prepared in analogy to example 1 using 5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl) methyl] benzoic acid TFA salt (Compound 65- . Example 66 (82 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.99-8.07 (m} , 3H), 7.90 (m, 1H), 7.40 to 7.46 (m, 2H), 7.32-7.39 (m, 2H), 7.21 to 2H), 4.06-4.13 (m, 2H), 3.68-7.25 (m, 2H) 3.78 (m, 3H), 3.78 (m, 2H), 3.44-3.58 (m, 2H), 3.18-3.31 (m, MS: Calcd. 653 (MH ⁺ ), measurement 653 (MH ⁺ ).

Example 67

2- [7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] ethoxy] acetic acid

Preparation of Example 67

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 2- [2- (3-oxo-pyrrolidine-1-carbonyl) -piperidine- (Compound 67-A), the title compound was prepared analogously to Example 1, but using in the next step the title compound . Example 67 (2.5 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-8.01 (d} , J = 4.0 Hz, 1H), 7.90 to 7.89 (d, J = 4.0 Hz , 1H), 7.35-7.38 (m, 2 H ), 7.24 (m, IH), 6.26 (s, IH), 4.66 (m, IH), 4.51 (m, IH), 4.05-4.40 (m, 5H), 3.70-3.83 3.70 (m, 3H), 3.40 (m, 3H), 3.32 (m, 2H), 1.13 (m, 3H). MS: Calculated 621 (MH &lt; ⁺ & gt ^; ), found 621 (MH ^&lt; ⁺ & gt ^; ).

A solution of 2- [2- (3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl) ethoxy] acetic acid (Compound 67- Produce

Step 1: To a solution of methyl (±) -4-Boc-piperazine-2-carboxylate (CAS: 129799-08-2, 2.44 g, 0.01 mol) and TEA (1.52 g, 0.015 mol) in DCM The mixture was added to a solution of (4-nitrophenyl) carbonyl chloridate (2.42 g, 0.012 mol) in DCM (10 mL). After 1 hour at room temperature, the organic layer was washed with water and saturated sodium bicarbonate solution and dried over sodium sulfate. After removal of the solvent, crude product 67-B was obtained and used in the next step without purification. MS: Calculated 410 (MH ⁺ ), found 410 (MH ⁺ ).

Step 2: A mixture of compound 67-B (1.0 g, 2.44 mmol), 2-aminoethanol (1.0 g, 16.4 mmol), TEA (0.49 g, 4.88 mmol) and nitromethane (2 mL) And heated for 3 hours. After removal of the solvent, the residue was treated with water and extracted with ethyl acetate. The solvent was removed to give the crude product 67-C. MS: Calculated 300 (MH ⁺ ), found 300 (MH ⁺ ).

Step 3: A mixture of compound 67-C (730 mg, 2.44 mmol) and BH ₃ .THF (1 M, 4.88 mL) was stirred at room temperature for 24 h, then the mixture was treated with saturated sodium bicarbonate aqueous solution, And extracted with ethyl acetate. After removal of the solvent, the product 67-D was obtained. MS: Calculated 286 (MH ^&lt; ⁺ & gt ^; ), found 286 (MH ^&lt; ⁺ & gt ^; ).

Step 4: A mixture of 67-D (0.5 g, 1.75 mmol) in THF (15 mL) was added to t- BuOK (0.294 g, 2.63 mmol). After stirring for 30 minutes t -butyl bromoacetate (0.68 g, 3.5 mmol) was added thereto. The mixture was then stirred at room temperature for an additional 2 hours, quenched with water and extracted with ethyl acetate. After removal of the solvent, crude product 67-E was obtained and used in the next step. MS: Calculated 400 (MH ⁺ ), found 400 (MH ⁺ ).

Step 5: Treat a mixture of compound 67-E (0.70 g, 1.75 mmol) in DCM (5 mL) with TFA (2 mL). After stirring for 1 hour at room temperature, the solvent and TFA residue were removed under reduced pressure to give the product 67-A. MS: Calcd. 244 (MH ^&lt; ⁺ & gt ^; ), found 244 (MH ^&lt; ⁺ & gt ^; ).

Example 68

2 - [(4R) -4- (2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] propoxy] acetic acid

Preparation of Example 68

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 2- [3- (3-oxo-pyrrolidine-1-carbonyl) -piperidine- 1-yl) propoxy] acetic acid (Compound 68-A), the title compound was prepared analogously to Example 1, . Example 68 (6.5 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.99-7.98 (d} , J = 4.0 Hz, 1H), 7.81 to 7.82 (d, J = 4.0 Hz , 1H), 7.32 (m, 2 H), 2H), 1.85 (m, 2H), 7.21 (m, 1H), 6.25 (s, 1H), 3.90-4.35 , &Lt; / RTI &gt; 2H), 1.15 (m, 3H). MS: Calculated 635 (MH ^&lt; ⁺ & gt ^; ), found 635 (MH ^&lt; ⁺ & gt ^; ).

A solution of 2- [3- (3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2- yl) propoxy] acetic acid (Compound 68- Produce

Compound 68-A was prepared similarly to compound 67-A using 3-aminopropane-1-ol instead of 2-aminoethanol.

Example 69

Methyl (4R) -4- (2-chloro-4-fluoro-phenyl) -6- [ Methyl-2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate &lt; / RTI &gt;

Preparation of Example 69

(5-hydroxy-4,4-dimethyl-pentyl) -1,5-dihydro-pyrazino [l, , 6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-3-one (Compound 69-A). Example 69 (55 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97-7.98 (d} , J = 4.0 Hz, 1H), 7.80 to 7.81 (d, J = 4.0 Hz , 1H), 7.45-7.48 (m, 1H) , 7.27 (m, IH), 7.08 (m, IH), 6.18 (s, IH), 3.80-4.40 (m, 4H), 3.65 m, 6 H), 2.50 (m, 2H), 1.50 (m, 2H), 1.25 (m, 2H), 0.89 (s, 6H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

(5-hydroxy-4,4-dimethyl-pentyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin- A)

t- butyl 2- (5-hydroxy-4,4-dimethyl-pentyl) -3-oxo-tetrahydro--5,6,8,8a- -1H- imidazo [1,5-a] pyrazin-7 -Carboxylate (Compound 69-B) (1 mmol) was dissolved in CH ₂ Cl ₂ (3 mL) and TFA (1 mL) was slowly added at 0 ° C. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give the crude product 69-A which was used directly in the next step.

t- Butyl 2- (5-hydroxy-4,4-dimethyl-pentyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [l, 5- a] pyrazine- (Compound 69-B)

Compound 69-B was prepared analogously to compound 67-D using 5-amino-2,2-dimethyl-pentan-l-ol instead of 2-aminoethanol.

Example 70

Chloro-3-fluoro-phenyl) -6 - [[2- (2-hydroxyethyl) -Imidazo [1,5-a] pyrazin-7-yl] methyl] -2-thiazol-2-yl-1,4- dihydropyrimidine-

Preparation of Example 70

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 2- (2-hydroxyethyl) - lH-pyrrolo [2,3-c] 1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-3-one (Compound 70-A). Example 70 (45 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.01-8.02 (d} , J = 4.0 Hz, 1H), 7.91 to 7.92 (d, J = 4.0 Hz , 1H), 7.38 (m, 2 H), 2H), 3.10-4.25 (m, 2H), 7.27 (m, 1H) 3.35 (m, 7 H). MS: Calcd. 563 (MH ⁺ ), measurement 563 (MH ⁺ ).

Preparation of 2- (2-hydroxyethyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-3-one (Compound 70-A)

t- butyl 2- (2-hydroxyethyl) -3-oxo-tetrahydro--5,6,8,8a- -1H- imidazo [1,5-a] pyrazine-7-carboxylate (Compound 67-D ) (1 mmol) was dissolved in CH ₂ Cl ₂ (3 mL) and TFA (1 mL) was slowly added at 0 ° C. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give crude product 70-A which was used directly in the next step.

Example 71

Chloro-3-fluoro-phenyl) -6 - [[2- (2-hydroxyethyl) -Imidazo [1,5-a] pyrazin-7-yl] methyl] -2-thiazol-2-yl-1,4- dihydropyrimidine-

Preparation of Example 71

(3-oxo-1,5,6,7) instead of 2,6-dimethyl-hexahydro-pyrazino [l, 2- , 8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl) pentanoic acid (Compound 71-A). Example 71 (45 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.01-8.02 (d} , J = 4.0 Hz, 1H), 7.91 to 7.92 (d, J = 4.0 Hz , 1H), 7.53 (m, 1H), 7.40 (m, 2H), 3.65 (m, 5H), 3.45 (m, 2H) , 1H), 3.10-3.35 (m, 4H), 1.55 (m, 4H), 1.20 (s, 6H). MS: Calcd. 563 (MH ⁺ ), measurement 563 (MH ⁺ ).

(3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl) pentanoic acid (Compound 71-A )

Step 1: To a solution of t- butyl 2- (5-hydroxy-4,4-dimethyl-pentyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ (0.4 g, 1.1 mmol) and pyridinium dichromate (1.7 g, 4.4 mmol) was stirred for 12 h and then treated with water, The pH was adjusted to below pH 7 with acetic acid and extracted with ethyl acetate. After removal of the solvent, crude product 71-B was obtained. MS: Calcd. 370 (MH ⁺ ), measurement 370 (MH ⁺ ).

Step 2: A mixture of 71-B (0.41 g, 1.1 mmol) and TFA (2 mL) in DCM (2 mL) was stirred at room temperature for 1.2 h. After removal of the solvent and TFA, crude product 71-A was obtained and used in the next step. MS: Calculated 270 (MH ⁺ ), found 270 (MH ⁺ ).

Example 72

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] cyclohexanecarboxylic acid

Preparation of Example 72

Hexahydro-pyrazino [1,2-c] [1,3] oxazin-6-one instead of (Compound D) cis - 4 - [(2R) -3- oxo -1,5,6,7, The title compound was prepared in analogy to example 1 using 8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] cyclohexanecarboxylic acid TFA salt (compound 72-A). Example 72 (30 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.42 (dd, J = 8.8, 6.3 Hz, 1H ), 7.24 (dd, J = 8.8, 2.5 Hz, 1H), 7.06 (td, J = 8.5, 2.6 Hz, 1H), 6.17 (s, 1H), 4.10 (d, J = 16.8 Hz, 1H), 3.79 -3.97 (m, 3H), 3.55-3.70 (m, 4H), 3.48 (t, J = 8.9 Hz, 1H), 3.11-3.26 (m, 1H), 3.03 (dd, J = 9.3, 4.0 Hz, 1H ), 2.71-2.96 (m, 3H), 2.04-2.42 (m, 5H), 1.77 (br s, 2H), 1.46-1.62 ppm (m, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

Cis - A] pyrazin-2-yl] cyclohexanecarboxylic acid TFA salt (Compound 72-A (2R) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ )

Of Example 19 using: (61367-16-6, TCI CAS) 4- amino-cyclohexane carboxylate hydrochloride was prepared from ethyl 3-amino-2,2-dimethyl-propane-O benzoate hydrochloride salt in place of methyl cis Compound 72-A was prepared similarly to compound Q.

Example 73

4 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] cyclohexanecarboxylic acid

Preparation of Example 73

Hexahydro-pyrazino [1,2-c] [1,3] oxazin-6-one (Compound D) in place of trans - 4 - [(2R) -3- oxo -1,5,6,7, The title compound was prepared in analogy to example 1 using 8,8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] cyclohexanecarboxylic acid TFA salt (compound 73-A). Example 73 (46 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.42 (dd, J = 8.8, 6.3 Hz, 1H ), 7.24 (dd, J = 8.5, 2.8 Hz, 1H), 7.06 (td, J = 8.5, 2.5 Hz, 1H), 6.17 (s, 1H), 4.10 (d, J = 17.1 Hz, 1H), 3.78 1H), 3.19 (d , J = 11.0 Hz, 1H), 3.03 (dd , J = 9.5, 4.0 Hz, 1H), 3.91 (s, 3H) 2.75-2.94 (m, 2H), 2.36 (dd, J = 11.7, 7.9 Hz, 2H), 1.93-2.24 (m, 5H), 1.77 (br. s., 2H), 1.53 ppm (d, J = 10.0 Hz, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

Trance - A] pyrazin-2-yl] cyclohexanecarboxylic acid TFA salt (Compound 73-A (2R) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ )

Example 19 using: (61367-07-5, TCI CAS) cyclohexane carboxylic acid methyl ester-3-ethyl-2,2-dimethyl-trans-4-amino-propane-O-methyl-benzoate hydrochloride salt in place of To give Compound 73-A.

Example 74

3 - [(8aS) -7 - [[(4R) -4- (2-Chlorophenyl) -5-methoxycarbonyl-2-thiazol- -Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] -2,2-dimethyl-

Preparation of Example 74

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propanoate was used instead of compound C) and hexahydro-pyrazino [ 2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound C-2) and 3 - [(8aS) -3-oxo-1,5,6 , 7,8,8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid (Compound Q) . Example 74 (6 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.41 (td, J = 7.4, 1.8 Hz, 2H ), 7.19-7.33 (m, 2H) , 6.21 (s, 1H), 4.08 (d, J = 17.1 Hz, 1H), 3.79-3.96 (m, 3H), 3.60 (s, 2H), 3.51 (t, J = 9.2 Hz, 1H), 3.37-3.42 (m, 1H), 3.07-3.28 (m, 3H), 2.74-2.94 (m, 2H), 2.12-2.41 (m, 4H), 1.39 (d, J = 6.3 Hz, 2H), 1.18 ppm (d , J = 4.0 Hz, 3H). MS: Calculated 587 (MH ^&lt; ⁺ & gt ^; ), found 587 (MH ^&lt; ⁺ & gt ^; ).

2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound C-2) was obtained in the same manner as in (2- Manufacturing

Compound C-2 was prepared similarly to compound C using 2-chlorobenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde.

Example 75

2 - [[(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- -Dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-

Preparation of Example 75

2 - [[(8aS) -3-oxo-l, 5,6,7,8,8-hexahydro-pyrazino [ , 8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] methyl] butanoic acid TFA salt (Compound 75-A). Example 75 (50 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96-7.97 (m} , 1H), 7.92 (d, J = 3.3 Hz, 1H), 7.54 (dd, J = 8.8, 6.0 Hz, 1H), 7.30 (d , J = 8.7,2.6 Hz, 1H), 7.12 (td , J = 8.3,2.6 Hz, 1H), 6.20 (s, 1H), 4.64-4.81 (m, 2H), 4.46-4.60 ), 4.01-4.26 (m, 2H) , 3.60-3.78 (m, 5H), 3.35-3.57 (m, 3H), 3.03-3.29 (m, 3H), 2.62 (dtd, J = 14.1, 8.4, 5.5 Hz , 1H), 1.50-1.74 (m, 2H), 0.99 ppm (t , J = 7.4 Hz, 3H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

A] pyrazin-2-yl] methyl] butanoic acid TFA salt (Compound 75 (a) -A)

(Amino methyl) butanoate (for its synthesis, Kaptein Bernardus (2005), et al., PCT international application WO &lt; RTI ID = 0.0 &gt; 2005/085462) was used to prepare compound 75-A, analogous to compound Q.

Example 76

(3-fluoro-2-methyl-phenyl) -2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid

Preparation of Example 76

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4S) -6- (bromomethyl) -4- (3-tert-butoxycarbonylamino) propionic acid in place of the compound C) and hexahydro-pyrazino [ (Compound C-3) and 3 - [(8aS) -3-oxo-thiophene-2- -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid (Compound Q) , The title compound was prepared. Example 76 (132 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.3 Hz, 1H), 7.75 (d, J = 3.3 Hz, 1H), 7.08-7.23 (m, 2H), 6.95 (t 2H), 3.26-3.33 (m, 1H, J = 8.8 Hz, 1H), 5.99 (s, 1H), 4.02-4.17 (m, 3H), 3.79-4.00 ), 3.17-3.25 (m, 1H) , 3.11 (dd, J = 9.3, 4.0 Hz, 1H), 2.78-2.99 (m, 2H), 2.53 (d, J = 2.0 Hz, 3H), 2.39 (dd, J = 11.2, 8.2 Hz, 1H), 2.14-2.26 (m, 1H), 1.21 (d, J = 2.8 Hz, 6H), 1.15 ppm (t, J = 7.2 Hz, 3H). MS: Calcd. 599 (MH ⁺ ), Measurement 599 (MH ⁺ ).

(4S) -6- (bromomethyl) -4- (3-fluoro-2-methyl-phenyl) -2-thiazol- (Compound C-3)

Compound C-3 was prepared similarly to compound C using 2-methyl-3-fluorobenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde and ethyl acetoacetate instead of methyl acetoacetate.

Example 77

Yl] -1,4-dihydropyrimidin-6-yl] methyl] -1H-pyrazolo [3,4-d] pyrimidin- ] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazin-2-yl] -2,2-dimethyl-

Preparation of Example 77

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (Bromomethyl) -4- (4-chlorophenyl) -7H-pyrrolo [2,3-d] pyrimidine instead of compound C) and hexahydro- 2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound C-4) and 3 - [(8aS) -3-oxo-1,5,6,7,8 , 8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid (Compound Q) the title compound was prepared in analogy to example 1. Example 77 (60 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.99 (dd} , J = 3.1, 1.4 Hz, 1H), 7.80 (d, J = 3.3 Hz, 1H), 7.26-7.42 (m, 4H), 5.64 -5.82 (m, 1H), 4.06 (dd, J = 16.8, 4.3 Hz, 1H), 3.72-3.90 (m, 3H), 3.69 (s, 3H), 3.37-3.61 (m, 2H), 3.00-3.24 (m, 2H), 2.55-2.97 (m, 3H), 2.11-2.39 (m, 2H), 1.19 ppm (dd, J = 4.4, 2.9 Hz, 6H). MS: Calculated 587 (MH ^&lt; ⁺ & gt ^; ), found 587 (MH ^&lt; ⁺ & gt ^; ).

Preparation of methyl 6- (bromomethyl) -4- (4-chlorophenyl) -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound C-

Compound C-4 was prepared analogously to compound C using 4-chlorobenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde, without separation of the chiral SFC of the dihydropyrimidine intermediate of Scheme 1-1.

Example 78

3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Propanoic acid

Preparation of Example 78

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 2-methoxy-3- (3-fluoro-phenyl) -2-thiazol- Similar to example 1, using the oxa-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl) propanoic acid TFA salt (Compound 78- The title compound was prepared. Example 78 (25 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.01 (d} , J = 3.3 Hz, 1H), 7.92 (d, J = 3.0 Hz, 1H), 7.33-7.43 (m, 2H), 7.19-7.30 (m, 1H), 6.27 ( s, 1H), 4.76 (d, J = 16.1 Hz, 1H), 4.58 (d, J = 16.1 Hz, 1H), 3.96-4.21 (m, 6H), 3.41-3.83 ( m, 10H), 3.10-3.31 (m, 5H), 1.13 ppm (t , J = 7.2 Hz, 3H). MS: Calculated 621 (MH &lt; ⁺ & gt ^; ), found 621 (MH ^&lt; ⁺ & gt ^; ).

A solution of 2-methoxy-3- (3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin- )

(Liang, Congxin and Feng, Yangbo) for the synthesis thereof, in place of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt. 2007/0072934), compound 78-A was prepared similarly to compound Q of Example 19. &lt; RTI ID = 0.0 &gt;

Example 79

2- [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-2-yl] spiro [3.3] heptane- 6-carboxylic acid

Preparation of Example 79

(8aS) -3-oxo-1,5,6,7,8-tetrahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1 using 8a-hexahydroimidazo [1,5- a] pyrazin-2-yl] spiro [3.3] heptane-6- carboxylic acid TFA salt (Compound 79- . Example 79 (7 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.00-7.92 (m} , 1H), 7.77 (d, J = 3.3 Hz, 1H), 7.42 (dd, J = 6.3, 8.5 Hz, 1H), 7.24 (dd, J = 2.5, 8.8 Hz, 1H), 7.06 (dt, J = 2.5, 8.4 Hz, 1H), 6.18 (s, 1H), 4.33-4.20 (m, 1H), 4.10 (dd, J = 4.4 (M, 2H), 3.96-3.73 (m, 4H), 3.66-3.58 (m, 3H), 3.57-3.46 ), 2.73 (d , J = 10.3 Hz, 1H), 2.44-2.05 (m, 8H). MS: Calculated 626 (MH ^&lt; ⁺ & gt ^; ), found 626 (MH ^&lt; ⁺ & gt ^; ).

5-a] pyrazin-2-yl] spiro [3.3] heptane-6-carboxylic acid To a solution of 2 - [(8aS) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ Preparation of salt (Compound 79-A)

3.3-heptane-6-carboxylate hydrochloride salt (PharmaBlock (R)) instead of the ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt Compound 79-A was prepared similarly to Compound Q of Example 19, using the compound of Example 19 (Nanjing) R & D Co. Ltd), PBLG1036).

Example 80

5 - [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-

Preparation of Example 80

(8aS) -3-oxo-1,5,6,7,8-hexahydro-pyrazino [1,2-c] [1,3] oxazin- The title compound was prepared in analogy to example 1 using 8a-hexahydroimidazo [l, 5-a] pyrazin-2-yl] pentanoic acid TFA salt (compound 80-A). Example 80 (18 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.02 (d} , J = 3.0 Hz, 1H), 7.92 (d, J = 3.0 Hz, 1H), 7.54 (ddd, J = 1.5, 6.0, 8.8 Hz , 7.30 (dd , J = 2.5, 8.5 Hz, IH), 7.22-7.09 (m, IH), 6.20 (s, IH), 4.76 (d , J = 16.1 Hz, IH), 4.66-4.39 (m, 1H), 4.20 (td , J = 3.4, 11.7 Hz, 1H), 4.10 (td , J = 4.1, 14.8 Hz, 1H), 3.83-3.56 (m, 6H), 3.54-3.38 , 3.30-3.10 (m, 5H), 2.43-2.28 (m, 2H), 1.62 (dd , J = 3.1, 5.9 Hz, 4H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

A] pyrazin-2-yl] pentanoic acid TFA salt (Compound 80-A) was reacted with 5- Manufacturing

Compound 80-A was prepared similarly to compound Q of Example 19 using methyl 5-aminopentanoate hydrochloride salt instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt.

Example 81

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4 Yl] methyl] cyclobutanecarboxylic acid &lt; / RTI &gt; &lt; RTI ID = 0.0 &

Preparation of Example 81

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and 3 - [(3-oxo-1, 2-dihydro-pyridin- Yl) methyl] cyclobutanecarboxylic acid TFA salt (Compound 81-A), the title compound was prepared in analogy to Example 1 using Lt; / RTI &gt; Example 81 (7 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.99 (d} , J = 3.0 Hz, 1H), 7.84 (d, J = 2.3 Hz, 1H), 7.43-7.28 (m, 2H), 7.27-7.13 (m, 1H), 6.25 ( s, 1H), 4.52-4.33 (m, 1H), 4.32-4.18 (m, 1H), 4.07 (q, J = 7.0 Hz, 3H), 3.68-3.47 (m, 2H ), 3.32-2.98 (m, 7H) , 2.65 (d, J = 7.5 Hz, 3H), 2.44-2.27 (m, 2H), 2.10-1.98 (m, 2H), 1.13 (t, J = 7.2 Hz, 3H). MS: Calcd. 631 (MH ⁺ ), Mass 631 (MH ⁺ ).

Yl) methyl] cyclobutanecarboxylic acid TFA salt (Compound 81-A) was prepared in a manner similar to that described in Example 1, but starting from 3- (3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ Manufacturing

(Compound 81-B) was used instead of ethyl 3-amino-2,2-dimethyl-propanoate hydrochloride salt to give Compound Q of Example 19 and Similarly, compound 81-A was prepared.

Preparation of methyl 3- (aminomethyl) cyclobutanecarboxylate hydrochloride salt (Compound 81-B)

Similarly to Compound 20 of Example 20, using compound 3- (aminomethyl) cyclobutanecarboxylic acid (Pharmablock (Nanjing) ALD Co., Ltd., CAS: 1310729-95-3) instead of DL-3-aminoisobutyric acid, compound 81-B.

Examples 82A and 82B (two isolated isomers)

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid; And

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2-cyclopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid

Example  82A and 82B

To a solution of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate in anhydrous dimethylformamide (3.0 mL) Diisopropylethylamine (1.0 mL), potassium iodide (125 mg, 0.75 mmol) and Compound C-1 (250 mg, 0.55 mmol) were added to a stirred solution of sodium hydride (compound 82-C, 176 mg, 0.5 mmol) ). The reaction mixture was flushed with nitrogen and heated at 55 [deg.] C for 2 hours. The reaction mixture was quenched by the addition of ice water and extracted three times with ethyl acetate (30 mL). The organic phase was separated, dried over Na ₂ SO _4, filtered and concentrated. The residue was purified by HPLC to give a mixture of the two isomers which were further dissolved by SFC using 30% isopropanol (0.05% DEA) / CO ₂ on a Chiralpak AD-3 column to give two single isomers : 82A-1 (faster elution, 77.3 mg, yield 25%) and 82B-1 (slower elution, 93 mg, 30% yield). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

A solution of 82A-1 (77.3 mg, 0.125 mmol) in tetrahydrofuran (0.62 mL) was added to lithium hydroxide monohydrate (52.7 mg, 1.25 mmol) in water (0.62 mL). The reaction mixture was stirred at 35 &lt; 0 &gt; C for 2 hours, then it was neutralized to pH 3.0 with 1 N hydrochloride solution. The mixture was extracted three times with ethyl acetate (30 mL). The combined organic phases were dried with Na ₂ SO ₄ and concentrated after filtration. The residue was purified by prep-HPLC to give Example 82A (56.2 mg). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.78 (d, J = 3.0 Hz, 1H), 7.34-7.27 (m, 2H), 7.16 (s , 1H), 6.25 (s, 1H), 4.31 (d, J = 17.3 Hz, 1H), 4.10-4.00 (m, 2H), 3.91 (d, J = 16.8 Hz, 1H), 3.86-3.75 (m, 2H), 3.62-3.54 (m, 1H), 3.46 (dd , J = 5.4,9.7Hz, 1H), 3.32-3.28 (m, 1H), 3.21-3.08 1H), 2.55 (br.s, 1H), 2.46 (t , J = 4.9 Hz, 1H), 1.13 (t , J = 7.2 Hz, 3H), 0.77-0.66 (m, 4H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 82B (68.3 mg) was prepared in analogy to example 82A. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.29 (s, 2H), 7.21-7.13 (m 1H), 6.22 (s, IH), 4.24 (d , J = 17.1 Hz, IH), 4.08-3.95 (m, 3H), 3.89-3.77 (m, 2H), 3.60-3.52 (D , J = 5.3, 9.5 Hz, 1H), 3.32-3.28 (m, 1H), 3.22-3.12 (m, 1H), 3.06 ), 2.50-2.42 (m, 1H), 1.12 (t , J = 7.0 Hz, 3H), 0.73 (s, 4H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Trans-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate trifluoroacetic acid salt (Compound 82- C)

Step 1: A mixture of compound AV (6.5 g, 16.7 mmol) and 1.0 M borane-THF complex solution in THF (40 mL, 40 mmol) was stirred overnight at 32 <0> C. The reaction mixture was concentrated. The residue was dissolved in ethyl acetate (60 mL) and a hydrogen chloride solution (4.0 M in dioxane, 2.0 mL) was added. The mixture was extracted three times with ethyl acetate (50 mL). The combined organic phases were dried with Na ₂ SO _4, filtered and concentrated. The residue was purified by column to obtain Compound 82-C-1 (4.0 g).

Step 2: To a solution of oxalyl chloride (2.0 mL) in anhydrous dichloromethane (60 mL) under nitrogen at-78 C was added dropwise dimethylsulfoxide (3.3 mL, 47 mmol) in anhydrous dichloromethane Respectively. After the addition, the reaction mixture was stirred at -78 &lt; 0 &gt; C for 1 hour. Compound 82-C-1 (4.0 g, 10.7 mmol) in anhydrous dichloromethane (6.0 mL) was then added dropwise to the reaction mixture and stirred for additional time at -78 <0> C. The reaction product was quenched by dropwise addition of triethylamine (12 mL, 86 mmol) over 30 minutes. The resulting mixture was allowed to warm to room temperature, the organic phase was washed with ice water, and separated using dried with Na ₂ SO _4, filtered and concentrated to give crude compound 82-C-2 (3.72 g , crude), and direct them Respectively.

Step 3: To a solution of compound 82-C-2 (930 mg, 2.5 mmol) in dichloromethane (10 mL) was added cyclopropylamine (260 L, 3.75 mmol), a catalytic amount of acetic acid (2 drops) and sodium triacetoxy (1.06 g, 5 mmol). The reaction mixture was stirred overnight at room temperature. The reaction product was quenched by adding iced water, extracted twice with dichloromethane (30 mL), the organic phase was washed with sodium bicarbonate solution, dried over Na ₂ SO ₄ , filtered and concentrated to give crude compound 82-C- 3 (1.03 g, crude).

Step 4: A mixture of compound 82-C-3 (1.03 g, 2.5 mmol) in dichloromethane (15 mL) was treated with diisopropylethylamine (1.0 mL) and 4- nitrophenyl chloroformate (1.0 g, 5.0 mmol) Lt; / RTI &gt; The reaction mixture was stirred at 40 &lt; 0 &gt; C for 2 hours. The reaction product was quenched by addition of ice water and extracted twice with dichloromethane (30 mL). The organic phase was washed with sodium bicarbonate solution and was dried with Na ₂ SO _4, filtered and concentrated. The residue was purified by column to obtain Compound 82-C-4 (1.4 g).

Step 5: A mixture of compound 82-C-4 (1.4 g, 2.42 mmol) and TFA / DCM = 2/1 (6 mL) was stirred at room temperature for 30 min. The reaction mixture was concentrated and toluene was added to remove the trifluoroacetic acid for simultaneous evaporation. The residue was dissolved in dichloromethane (15 mL) and diisopropylethylamine (2 mL) was added. The reaction mixture was heated to 40 &lt; 0 &gt; C overnight. To the reaction mixture was added di- t- butyl dicarbonate (1.1 g, 5.0 mmol) and stirred for an additional 5 h. The reaction mixture was quenched by the addition of ice water and extracted twice with ethyl acetate (30 mL). The organic phase was separated, dried _over Na ₂ SO _4, filtered and concentrated. The residue was purified by column to obtain 82-C-5 (680 mg).

Step 6: A mixture of compound 82-C-5 (170 mg, 0.5 mmol) and TFA / DCM = 2/1 (3 mL) was stirred at room temperature for 30 minutes. The reaction mixture was concentrated and toluene was added to remove the trifluoroacetic acid for simultaneous evaporation to give crude Compound 82-C which was used directly.

Examples 83A and 83B (two isolated isomers)

(8R, 8aS) -2-Cyclopropyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ; And

(8S, 8aR) -2-Cyclopropyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid

Preparation of Examples 83A and 83B

Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-5-carboxylate (Compound C-1) instead of methyl (4S) -6- (bromomethyl) -4- (3,4-difluoro-2-methyl- Two title compounds were prepared analogously to Examples 82A and 82B using 4-dihydropyrimidine-5-carboxylate (Compound C-5).

Example 83A (99 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.14-7.07 (m, 1H), 7.06-6.98 (m, 1H), 5.93 ( s, 1H), 4.29 (d, J = 17.1 Hz, 1H), 3.88 (d, J = 17.3 Hz, 1H), 3.79 (br. s., 2H), 3.62 (s , 3H), 3.55 (s, 1H), 3.46 (d, J = 5.5 Hz, 1H), 3.26 (d, J = 9.8 Hz, 1H), 3.20-3.09 (m, 1H), 2.85 (d, J = 10.8 Hz, 1H), 2.56 (d , J = 2.3 Hz, 3H), 2.54-2.42 (m, 2H), 0.78-0.68 (m, 4H). MS: Calculated 587 (MH ^&lt; ⁺ & gt ^; ), found 587 (MH ^&lt; ⁺ & gt ^; ).

Example 83B (72.9 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.94 (d} , J = 3.3 Hz, 1H), 7.75 (d, J = 3.3 Hz, 1H), 7.09 (d, J = 4.8 Hz, 2H), 5.90 (s, 1H), 4.21 (d, J = 17.1 Hz, 1H), 3.97 (d, J = 17.1 Hz, 1H), 3.88-3.76 (m, 2H), 3.61 (s, 3H), 3.58-3.50 (m, 1H), 3.46-3.40 ( m, 1H), 3.28 (s, 1H), 3.21-3.12 (m, 1H), 3.08-2.99 (m, 1H), 2.63 (d, J = 3.3 Hz, 1H ), 2.56 (d , J = 2.3 Hz, 3H), 2.50-2.42 (m, 1H), 0.79-0.66 (m, 4H). MS: Calculated 587 (MH ^&lt; ⁺ & gt ^; ), found 587 (MH ^&lt; ⁺ & gt ^; ).

Example 83A was synthesized from compound 83A-1 (more rapid elution) in Chiralcel OJ-H column eluting with 25% methanol (0.05% DEA) / CO ₂ and compound 83B-1 was synthesized from compound 83B-1 Slow elution).

Methyl (4S) -6- (bromomethyl) -4- (3,4-difluoro-2-methyl-phenyl) -2-thiazol- - Preparation of carboxylate (Compound C-5)

Compound C-5 was prepared similarly to compound C using 3,4-difluoro-2-methylbenzaldehyde instead of 2-chloro-4-fluorobenzaldehyde.

Examples 84A and 84B (two isolated isomers)

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid; And

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid

Preparation of Examples 84A and 84B

Instead of trans-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- Using 2-isopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [l, 5-a] pyrazine-8-carboxylate (Compound 84-C) And 2 &lt; RTI ID = 0.0 &gt; 82B. &Lt; / RTI &gt;

Example 84A (20.3 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.11 (d} , J = 3.0 Hz, 1H), 8.01 (d, J = 3.0 Hz, 1H), 7.39 (d, J = 2.0 Hz, 2H), 7.28-7.21 (m, 1H), 6.32 (s, 1H), 4.38 (d, J = 17.3 Hz, 1H), 4.08 (d, J = 6.5 Hz, 4H), 3.93-3.82 (m, 2H), 3.62 1H), 3.10-3.04 (m, 1H), 2.69 (d , J = 3.5 Hz, 1H), 1.25-1.11 (m, 9H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 84B (32.5 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.10 (s} , 1H), 8.02 (s, 1H), 7.38 (d, J = 4.3 Hz, 2H), 7.29-7.23 (m, 1H), 6.30 (s, 1H), 4.36 ( d, J = 16.6 Hz, 1H), 4.14-4.03 (m, 4H), 3.87 (d, J = 3.3 Hz, 2H), 3.56 (d, J = 9.8 Hz, 2H) , 3.50-3.44 (m, 1H), 3.20 (s, 2H), 2.77 (d , J = 3.5 Hz, 1H), 1.24-1.10 (m, 9H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 84A was synthesized from Compound 84A-1 (more rapid elution) in Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and Compound 84B was synthesized from Compound 84B-1 Slow elution).

Preparation of methyl 2-isopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (Compound 84-C)

Compound 84-C was prepared similarly to compound 82-C using isopropylamine instead of cyclopropylamine.

Examples 85A and 85B (two isolated single isomers)

(8R, 8aS) -7 - [[(4S) -4- (3,4-Difluoro-2-methyl-phenyl) -5-methoxycarbonyl- Yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ; And

(8S, 8aR) -7 - [[(4S) -4- (3,4-Difluoro- Yl] methyl] -2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid

Preparation of Examples 85A and 85B

Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-5-carboxylate (Compound C-1) instead of methyl (4S) -6- (bromomethyl) -4- (3,4-difluoro-2-methyl- 4-dihydro-pyrimidine using 5-carboxylate (compound C-5), and trans-2-methyl-cyclopropyl-3-oxo -1,5,6,7,8,8a- hexahydro-imidazo [1 , 5-a] pyrazine-8-carboxylate (Compound 82-C) instead of methyl 2-isopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ a] pyrazine-8-carboxylate (Compound 84-C), the title compound was prepared in analogy to Examples 82A and 82B.

Example 85A (3.6 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.10 (d} , J = 3.3 Hz, 1H), 7.99 (d, J = 3.0 Hz, 1H), 7.26-7.19 (m, 1H), 7.14-7.04 (m, 1H), 6.01 ( s, 1H), 4.34 (d, J = 17.1 Hz, 1H), 4.11 (s, 1H), 3.98 (d, J = 17.3 Hz, 1H), 3.85 (d, J = 2H), 3.65 (s, 3H), 3.61-3.54 (m, 1H), 3.50 (s, 2H), 3.22-3.13 (m, 1H), 2.56 (d , J = 2.3 Hz, 3H), 1.20 (dd , J = 6.8, 14.3 Hz, 6H). MS: Calculated 589 (MH ^&lt; ⁺ & gt ^; ), found 589 (MH ^&lt; ⁺ & gt ^; ).

Example 85B (2.3 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.07 (d} , J = 3.0 Hz, 1H), 7.96 (d, J = 3.3 Hz, 1H), 7.25-7.17 (m, 1H), 7.16-7.07 (m, 1H), 5.99 ( s, 1H), 4.30 (d, J = 16.8 Hz, 1H), 4.16-3.99 (m, 2H), 3.92-3.82 (m, 2H), 3.65 (s, 3H), (M, 2H), 2.78-2.68 (m, 1H), 2.55 (d , J = 2.3 Hz, 3H), 1.19 dd , J = 6.8, 14.1 Hz, 6H). MS: Calculated 589 (MH ^&lt; ⁺ & gt ^; ), found 589 (MH ^&lt; ⁺ & gt ^; ).

Example 85A was synthesized from compound 85A-1 (faster elution) in Chiralpak AD-3 column eluting with 20% isopropanol (0.05% DEA) / CO ₂ and compound 85B-1 was synthesized from compound 85B-1 Slow elution).

Examples 86A and 86B (two isolated single isomers)

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid; And

Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol-2-yl (2S, -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-

Preparation of Examples 86A and 86B

Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-5-carboxylate (compound C-1) instead of (R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrido pyrimidine-5-carboxylic acid methyl ester used (compound C) and trans-2-methyl-cyclopropyl-3-oxo -1,5,6,7,8,8a- hexahydro-imidazo [1,5-a] pyrazine 8-carboxylate (compound C-82) instead of 2- methyl-t- butyl-3-oxo -1,5,6,7,8,8a- hexahydro-imidazo [1,5-a] pyrazine to -8 -Carboxylate (Compound 86-C), the title compound was prepared in analogy to example 82A and 82B.

Example 86A (64.8 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.98 (d} , J = 3.0 Hz, 1H), 7.80 (d, J = 3.3 Hz, 1H), 7.52-7.45 (m, 1H), 7.24 (dd ,. J = 2.6, 8.7 Hz , 1H), 7.06 (d, J = 2.8 Hz, 1H), 6.19 (s, 1H), 4.32 (d, J = 17.3 Hz, 1H), 3.97 (br. s, 1H ), 3.82-3.72 (m, 2H), 3.65-3.58 (m, 4H), 3.57-3.51 (m, (m, 1 H), 2.65 - 2.53 (m, 1 H), 1.41 (s, 9H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 86B (71.1 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.78 (d, J = 3.0 Hz, 1H), 7.46 (dd, J = 6.1, 8.7 Hz, 1H ), 7.25 (dd , J = 2.6, 8.7 Hz, 1H), 7.13-7.05 (m, 1H), 6.15 (s, 1H), 4.25 (d , J = 17.3 Hz, 1H), 4.03 2H), 3.65-3.57 (m, 4H), 3.55-3.48 (m, 1H), 3.41-3.36 -2.62 (m, 1 H), 1.40 (s, 9 H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 86A was synthesized from compound 86A-1 (faster elution) in Chiralpak AD-3 column eluting with 25% isopropanol (0.05% DEA) / CO ₂ and 86B- Slow elution).

Methyl 2- t- Butyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (Compound 86-C)

Compound 86-C was prepared similarly to compound 82-C using t- butylamine instead of cyclopropylamine.

Examples 87A and 87B (two isolated isomers)

(8R, 8aS) -2- t- Butyl-7 - [[(4R) -4- (2-chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid; And

(8S, 8aR) -2- t- Butyl-7 - [[(4R) -4- (2-chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-

Preparation of Examples 87A and 87B

Instead of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- Using 2 -t- butyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [l, 5-a] pyrazine-8-carboxylate (Compound 86- Two analogs of the title compound were prepared analogously to 82A and 82B.

Compound 87B-1 (mono-isomer, structure is one of the two indicated above): Methyl (8S, 8aR) -2-t-butyl- - phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-l, 4-dihydropyrimidin-6- yl] methyll-3- oxo-5,6,8,8a-tetrahydro -LH-imidazo [l, 5-a] pyrazine-8-carboxylate; Or methyl (8R, 8aS) -2-t-butyl-7 - [[(4R) -4- (2-chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Yl-methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine- Late.

Compound 87B-1 (316 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.34-7.23 (m, 2H), 7.16 (t 1H , J = 8.5 Hz, 1H), 6.22 (s, 1H), 5.51 (s, 2H), 4.14 (d , J = 17.1 Hz, 1H), 4.08-4.00 , 3.81-3.69 (m, 5H), 3.58-3.52 (m, IH), 3.35 (br. S., IH), 3.27 (d , J = 9.5 Hz, 2.95 (d , J = 12.3 Hz, 1H), 2.52 (dt , J = 3.4, 12.0 Hz, 1H), 1.39 (s, 9H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calculated 633 (MH ^+), a measure 633 (MH ⁺⁾

Example 87A (52.7 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.98 (d} , J = 3.0 Hz, 1H), 7.79 (d, J = 3.0 Hz, 1H), 7.35-7.27 (m, 2H), 7.17 (s , 1H), 6.25 (s, 1H), 4.39-4.28 (m, 1H), 4.09-4.01 (m, 2H), 3.99-3.86 (m, 1H), 3.76 (d, J = 9.8 Hz, 2H), (M, 1H), 3.63-3.58 (m, 1H), 3.57-3.51 (m, 1H), 3.40-3.36 m, 1 H), 1.41 (s, 9 H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

Example 87B (61.3 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.36-7.26 (m, 2H), 7.21-7.14 (m, 1H), 6.22 (s, 1H), 4.27 (d , J = 16.8 Hz, 1H), 4.09-3.97 (m, 3H), 3.86-3.71 (m, 2H), 3.65-3.55 1H), 1.40 (s, 9H), 1.13 (t , 2H), 3.35-3.46 (m , J = 7.2 Hz, 3 H). MS: Calculated 619 (MH ^+), a measure 619 (MH ⁺⁾

Example 87A was synthesized from compound 87A-1 (more rapid elution) in Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and compound 87B-1 was synthesized from compound 87B-1 Slow elution).

Examples 88A and 88B (two isolated single isomers)

(8R, 8aS) -2-t-Butyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5- methoxycarbonyl- Yl] -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carboxylic acid; And

(8S, 8aR) -2-t-Butyl-7 - [[(4S) -4- (3,4- difluoro-2- methyl- phenyl) -5-methoxycarbonyl- Yl] -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Carboxylic acid

Preparation of Examples 88A and 88B

Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-5-carboxylate (Compound C-1) instead of methyl (4S) -6- (bromomethyl) -4- (3,4-difluoro-2-methyl- 4-dihydro-pyrimidine using 5-carboxylate (compound C-5), and trans-2-methyl-cyclopropyl-3-oxo -1,5,6,7,8,8a- hexahydro-imidazo [1 , 5-a] pyrazine-8-carboxylate (Compound 82-C) in place of methyl 2 -t- butyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [ -a] pyrazine-8-carboxylate (Compound 86-C), the title compound was prepared in analogy to Examples 82A and 82B.

Example 88A (37.2 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.78 (d, J = 3.0 Hz, 1H), 7.14-7.09 (m, 1H), 7.08-6.99 (m, 1H), 5.94 (s, 1H), 4.32 (d , J = 17.1 Hz, 1H), 3.91 (d , J = 17.1 Hz, 1H), 3.79-3.71 m, 4H), 3.56-3.50 (m , 1H), 3.36 (d, J = 9.8 Hz, 1H), 3.17-3.06 (m, 1H), 2.89 (d, J = 11.3 Hz, 1H), 2.56 (d , J = 2.3 Hz, 4H), 1.40 (s, 9H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 88B (61.2 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.3 Hz, 1H), 7.77 (d, J = 3.3 Hz, 1H), 7.14-7.02 (m, 2H), 5.91 (s , 1H), 4.25 (d, J = 17.1 Hz, 1H), 4.01 (d, J = 17.1 Hz, 1H), 3.85-3.72 (m, 2H), 3.66-3.56 (m, 4H), 3.54-3.46 ( (m, 2H), 2.69 (d , J = 10.3 Hz, 1H), 2.56 (d , J = 2.5 Hz, 3H), 1.40 s, 9H). MS: calcd 603 (MH ⁺ ), measurement 603 (MH ⁺ ).

Example 88A was synthesized from compound 88A-1 (more rapid elution) in ChiralPac AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and compound 88B-1 was synthesized from compound 88B-1 Slow elution).

Example 89

Methyl 7 - [[(4R) -4- (2-chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- -Yl] methyl] -3-oxo-2,5,6,8-tetrahydro-1H-imidazo [1,5- a] pyrazine-8a-

Preparation of Example 89

Hexahydro-pyrazino [l, 2-c] [1,3] oxazin-6-one (compound D) in place of methyl 3-oxo-1,2,5,6,7,8-hexahydroimidazo [1,5-a] pyrazine-8a-carboxylate The title compound was prepared in analogy to example 1 using the TFA salt (compound X).

Examples 90A and 90B (two isolated isomers)

2- [(8aS) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- 6-yl] methyl] -1,1-dimethyl-3-oxo-6,8-dihydro-5H-oxazolo [3,4-a] pyrazin-8-yl] acetic acid; And

2 - [(8aR) -7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl- Yl] methyl] -1,1-dimethyl-3-oxo-6,8-dihydro-5H-oxazolo [3,4- a] pyrazin-

Preparation of Examples 90A and 90B

Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4- dihydropyrimidine-5-carboxylate (compound C-1) instead of (R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrido Methyl-2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine (Compound C) -8-carboxylate (Compound 82-C) instead of methyl 2- (1,1-dimethyl-3-oxo-5,6,7,8-tetrahydrooxazolo [3,4- a] pyrazine-8a -Yl) acetate (Compound 90-C), the title compound was prepared in analogy to Examples 82A and 82B.

Example 90A (13 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} δ ppm 7.92 (d, J = 3.3 Hz, 1H), 7.71 (d, J = 3.0 Hz, 1H), 7.43 (dd, J = 6.0, 8.8 Hz, 1H), 7.23 ( dd, J = 2.5, 8.8 Hz , 1H), 7.06 (dt, J = 2.5, 8.4 Hz, 1H), 6.16 (s, 1H), 4.21 (d, J = 16.3 Hz, 1H), 3.87-3.71 (m , 3H), 3.61 (s, 3H), 3.52 (d, J = 11.5 Hz, 1H), 3.37 (br, 1H), 2.94 (d, J = 11.3 Hz, 1H), 2.63 (d, J = 16.1 Hz , 1 H), 2.46-2.30 (m, 2 H), 1.47 (s, 3 H), 1.42 (s, 3 H). LC / MS: calculated 592 (MH ⁺ ), found 592 (MH ⁺ ).

Example 90B (25 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} δ ppm 7.96 (d, J = 3.0 Hz, 1H), 7.75 (d, J = 3.0 Hz, 1H), 7.54 (dd, J = 6.3, 8.8 Hz, 1H), 7.21 ( 2H), 3.89-3.71 (m, 2H), 6.96 (d , J = 2.8, 8.8 Hz, 1H), 7.06 (dt , J = 2.5,8.4 Hz, J = 8.3 Hz, 1H), 2.72 (d , J = 16.8 Hz, 1H), 2.43 (d , J = 11.3 Hz, 1H), 3.66-3.55 (m, 4H) 1H), 2.31 (dt , J = 4.0,11.9 Hz, 1H), 1.57 (s, 3H), 1.47 (s, 3H); LC / MS: calculated 592 (MH ⁺ ), found 592 (MH ⁺ ).

Example 90A was prepared (more rapid elution) from compound 90A-1 in chiralpack AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and Example 90B was synthesized from compound 90B-1 Slow elution).

Preparation of methyl 2- (1,1-dimethyl-3-oxo-5,6,7,8-tetrahydrooxazolo [3,4-a] pyrazin-8a- yl) acetate (Compound 90-

Step 1: To a solution of DIPA (3.67 g, 36 mmol, 1.2 eq.) In THF (18 mL) was added dropwise n-BuLi (2 M, 18 mL, 1.2 eq.) Over 15 min at -78 <0>Lt; RTI ID = 0.0 &gt; -78 C &lt; / RTI &gt; Compound AH (10.3 g, 30 mmol, 1.0 eq.) In THF (30 mL) was then added dropwise to the reaction product at -78 째 C and after the addition was complete, the mixture was stirred at -78 째 C for a further 30 minutes. BOMCl (7 g, 45 mmol) in THF (20 mL) was added dropwise over 20 min at -78 <0> C and the reaction product was stirred for 16 h during which time the temperature was allowed to warm to room temperature. The reaction product was quenched with 1 M HCl (50 mL), extracted twice with EA (100 mL), the organic layer was dried and concentrated and the residue was purified with silica gel (EA / PE: 0% to 20% To give compound 90-C-1 (8.2 g) as a colorless oil.

Step 2: A mixture of compound 90-C-1 (8.2 g, 17.6 mmol) and Pd (OH) ₂ / C (500 mg, 20%) in MeOH (100 mL) was stirred under hydrogen at room temperature for 2 hours , The solid was filtered off and the filtrate was concentrated and the residue was purified by silica gel (EA / PE: 0% to 40%) to give compound 90-C-2 (6.1 g) as a colorless oil.

Step 3: To a solution of compound 90-C-2 (3.74 g, 0.01 mol, 1.0 eq.) And imidazole (0.81 g, 0.012 mol, 1.2 eq.) In DMF (20 mL) at room temperature was added TBSCl (1.65 g, 0.11 mol a, 1.1 eq) of the mixture at room temperature was slowly added and stirred for 16 hours, diluted with EA (50 mL), washed with water (50 mL) and brine (50 mL), organic layer was Na ₂ SO ₄ , And concentrated to give compound 90-C-3 (4.4 g) as a colorless oil. MS: Calcd. 489 (MH ⁺ ), Measurement 489 (MH ⁺ ).

Step _{4: CH 3 MgBr (3.2 M} , 15 mL, 5.0 eq.) Over a period of 15 minutes at -40 ℃ To a solution of THF (50 mL) of compound 90-C-3 (4.4 g , 9 mmol, 1.0 eq) After the dropwise addition, the reaction mixture was stirred for 16 hours, and the temperature was allowed to warm to room temperature during this period. The reaction product was quenched with 1 M HCl (50 mL), extracted with EA (100 mL), the organic layer was dried and concentrated and the residue was purified on silica gel (EA / PE: 20-40% Compound 90-C-4 (1.9 g) was obtained as an oil. MS: Calcd. 415 (MH ⁺ ), Measurement 415 (MH ⁺ ).

Step 5: A solution of 90-C-4 (1.86 g, 4.5 mmol, 1.0 eq.) And TBAF (1 M, 9 mL, 2.0 eq.) In THF (20 mL) was stirred at room temperature for 2 hours and EA diluted with 50 mL), water (50 mL) and washed with brine (50 mL), dry the organic layer with Na ₂ SO ₄ and concentrated, and the residue was purified by silica gel (EA / PE: 30% to 70%) To give compound 90-C-5 (1.2 g) as a colorless oil. MS: Calcd 301 (MH ⁺ ), found 301 (MH ⁺ ).

Step 6: THF (20 mL) of compound 90-C-5 (0.9 g , 3 mmol, 1.0 _{equiv), PPh 3 (1.57 g,} 6 mmol, 2.0 eq.) And imidazole (0.41 g, 6 mmol, 2.0 eq. ) Was refluxed for 1 hour, then iodine (1.3 g, 4.5 mmol, 1.5 eq.) Was added and refluxed for 2 hours. Then diluting the reaction product with EA (50 mL), washed with water (50 mL) and brine (50 mL), dried the organic layer with Na ₂ SO ₄ and concentrated, and the residue was purified by silica gel in (EA / PE : 0% to 25%) to obtain Compound 90-C-6 (0.61 g) as a colorless oil. MS: calculated value 411 (MH ⁺ ), measured value 411 (MH ⁺ ).

Step 7: A mixture of 90-C-6 (0.61 g, 1.5 mmol, 1.0 eq) and KCN (0.195 g, 3 mmol, 2.0 eq) in DMSO (10 mL) was stirred at 80 <0> C for 16 h. The reaction product was then diluted with EA (50 mL), washed with water (50 mL) and brine (50 mL), the organic layer was dried over Na ₂ SO ₄ , concentrated and the residue was purified on silica gel (EA / PE: 0% to 25%) to obtain Compound 90-C-7 (0.41 g) as a colorless oil. MS: Calculated 310 (MH ⁺ ), found 310 (MH ⁺ ).

Step 8: A mixture of 90-C-7 (0.41 g, 1.3 mmol, 1.0 eq) in HCl / MeOH (3 M, 10 mL) was stirred at 80 <0> C for 16 hours. The reaction product was then concentrated to give 0.36 g of compound 90-C as a white solid. MS: Calculated 243 (MH ^&lt; ⁺ & gt ^; ), found 243 (MH ^&lt; ⁺ & gt ^; ).

Examples 91A and 91B (two isolated isomers)

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid; And

Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-

Preparation of Examples 91A and 91B

Instead of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- Example 82A was prepared using 2-methyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [l, 5-a] pyrazine-8-carboxylate (Compound 91- Two title compounds were prepared analogously to 82B.

Example 91A (26 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} 7.97 (d, J = 3.3 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.36-7.26 (m, 2H), 7.22-7.11 (m, 1H), 6.25 (s, 1H), 4.30 (d, J = 17.3 Hz, 1H), 4.04 (q, J = 7.2 Hz, 2H), 3.95-3.82 (m, 3H), 3.61-3.45 (m, 2H), 3.31 2H), 2.93-2.81 (m, 4H), 2.49 (br, 1H), 1.13 (t , J = 7.0 Hz, 3H). LC / MS: calculated 577 (MH ⁺ ), found 577 (MH ⁺ ).

Example 91B (38 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} 7.96 (d, J = 3.0 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.39-7.25 (m, 2H), 7.17 (td, J = 2.0, 7.5 , 9.1 Hz, 1H), 6.21 (s, 1H), 4.24 (d, J = 16.8 Hz, 1H), 4.04 (q, J = 7.1 Hz, 2H), 3.98-3.78 (m, 3H), 3.60-3.42 (m, 2H), 3.31-3.16 ( m, 2H), 3.04 (d, J = 10.3 Hz, 1H), 2.83 (s, 3H), 2.61 (br, 1H), 1.12 (t, J = 7.0 Hz, 3H). LC / MS: calculated 577 (MH ⁺ ), found 577 (MH ⁺ ).

Example 91A was synthesized from Compound 91A-1 (more rapid elution) in Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ Slow elution).

Preparation of methyl 2-methyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (Compound 91-

Compound 91-C was prepared similarly to compound 82-C using methylamine instead of cyclopropylamine.

Examples 92A and 92B (two isolated isomers)

Methyl (4R) -6 - [[(8R, 8aS) -2-t- butyl-8-carbamoyl-3-oxo-5,6,8,8a-tetrahydro- a] pyrazin-7-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate; And

Methyl (4R) -6 - [[(8S, 8aR) -2-t-butyl-8-carbamoyl-3-oxo-5,6,8,8a-tetrahydro- a] pyrazin-7-yl] methyl] -4- (2-chloro-4-fluoro-phenyl) -2-thiazol-

Preparation of Examples 92A and 92B

Instead of trans-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- the -2- t- butyl-3-oxo-hexahydro--1,5,6,7,8,8a- already using imidazo [1,5-a] pyrazin-8-carboxamide (compound 92-C) Two title compounds were prepared analogously to Examples 82A and 82B. The crude product was purified by HPLC to give a mixture of the two isomers which were further dissolved in SFC to give two single isomers 92A (more) using 30% isopropanol (0.05% DEA) / CO ₂ on a Chiralpak AD- Fast elution) and 92B (slower elution).

Example 92A (30 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} δ 7.97 (d, J = 3.0 Hz, 1H), 7.74 (d, J = 3.3 Hz, 1H), 7.37-7.21 (m, 2H), 7.20-7.08 (m, 1H) , 6.20 (s, 1H), 4.18 (d, J = 17.1 Hz, 1H), 4.02 (q, J = 7.0 Hz, 2H), 3.84-3.72 (m, 3H), 3.55 (t, J = 8.8 Hz, 2H), 3.14 (dt, J = 3.5, 12.7 Hz, 1H), 3.05 (d, J = 9.3 Hz, 1H), 3.00-2.89 (m, 1H), 2.45 (dt, J = 3.5, 11.9 Hz, 1H ), 1.40 (s, 9H), 1.12 (t , J = 7.2 Hz, 3H). MS: Calculated 618 (MH ^&lt; ⁺ & gt ^; ), found 618 (MH ^&lt; ⁺ & gt ^; ).

Example 92B (30 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} δ 7.98 (d, J = 3.0 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.36-7.23 (m, 2H), 7.20-7.09 (m, 1H) , 6.25 (s, 1H), 4.24 (d, J = 17.3 Hz, 1H), 4.04 (q, J = 7.1 Hz, 2H), 3.85-3.68 (m, 3H), 3.57 (t, J = 8.8 Hz, J = 3.4, 12.0 Hz, 1H), 1.49-1.34 (s, 1H), 3.37-2.35 (m, 9H), 1.13 (t , J = 7.0 Hz, 3 H). MS: Calculated 618 (MH ^&lt; ⁺ & gt ^; ), found 618 (MH ^&lt; ⁺ & gt ^; ).

Trance - 2- t- Butyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxamide (Compound 92-C)

Step 1: To a solution of 92-C-1 (355 mg, 1 mmol) in THF (5 mL) was added lithium hydroxide monohydrate (124 mg, 3 mmol) in water (1 mL). The reaction mixture was stirred at 35 &lt; 0 &gt; C for 2 hours, then it was neutralized to pH 3.0 with 1 N hydrochloride solution. The mixture was extracted three times with ethyl acetate (30 mL). After drying of the combined organic phases with Na ₂ SO _4, filtered and concentrated to give 92-C-2 (340 mg ) as a white solid. MS: Calculated 356 (MH ^&lt; ⁺ & gt ^; ), found 356 (MH ^&lt; ⁺ & gt ^; ).

Step 2: the compound 92-C-2 THF (10 mL) (340 mg, 1 mmol), HATU (380 mg, 1 mmol), NH 4 Cl (275 mg, 5 mmol) and DIPEA (775 mg, 6 mmol ) Was stirred at 50 &lt; 0 &gt; C for 2 hours. The undissolved material was then filtered off and the filtrate was concentrated. The residue was purified by silica gel (EA / PE: 0% to 40%) to give compound 92-C-3 (200 mg) as a white solid. MS: Calculated 355 (MH ^&lt; ⁺ & gt ^; ), found 355 (MH ^&lt; ⁺ & gt ^; ).

Step 3: The mixture of compound 92-C-3 (200 mg, 0.6 mmol) in DCM / TFA (5 mL, 2: 1) was stirred at room temperature for 2 hours and then the mixture was concentrated under reduced pressure to give Compound 92-C (200 mg) was obtained, which was used directly in the next step. MS: calculated value 255 (MH ⁺ ), measured value 255 (MH ⁺ ).

Trans-7- t- Butyl-8-methyl-2- t- Preparation of butyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [l, 5-a] pyrazine-7,8-dicarboxylate (Compound 92-

Compound 92-C-1 was prepared similarly to compound 82-C-5 using t- butylamine instead of cyclopropylamine.

Example 93

3-fluoro-phenyl) -5-propoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-propanoic acid

Preparation of Example 93

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (8aS) -7 - [[(4R) -4- (4-methylpiperazin-1-yl) (2-chloro-3-fluoro-phenyl) -5-propoxycarbonyl-2-thiazol-2-yl-1,4- dihydropyrimidin- (Compound C-6) and 3 - [(8aS) -7,8,8a-tetrahydro- lH-imidazo [1,5- a] pyrazin- 5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] -2,2-dimethyl-propanoic acid (Compound Q) The title compound was prepared in analogy to example 1. &lt; RTI ID = 0.0 &gt; Example 93 (6 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} δ 7.96 (d, J = 3.0 Hz, 1H), 7.75 (d, J = 3.0 Hz, 1H), 7.34-7.21 (m, 2H), 7.15 (dt, J = 1.6, 1H), 3.45-3.37 (m, 1H, &lt; RTI ID = 0.0 &gt; ), 3.33-3.29 (m, 1H), 3.25-3.15 (m, 1H), 3.11 (dd , J = 4.0,9.5 Hz, ), 2.19 (t , J = 10.9 Hz, 1H), 1.59-1.47 (m, 2H), 1.21 (d , J = 2.8 Hz, 6H), 0.76 (t , J = 7.4 Hz, 3H). MS: Calcd: 633 (MH ⁺ ), Found 633 (MH ⁺ ).

profile ( 4 Chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate ( Preparation of Compound C-6)

Compound C-6 was prepared analogously to compound C using n -propyl acetoacetate instead of methyl acetoacetate.

Example 94

Chloro-4-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol-2-yl-1,4- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- Methyl-butanoic acid

Preparation of Example 94

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-1) and (3R) -3 - [(8aS) -2-thiazol-2-yl-1,4-dihydropyrimidine- Yl) butanoic acid TFA salt (Compound 54-A) was used instead of 3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin- , The title compound was prepared. Example 57 (48 mg) was obtained as a light yellow solid. ^{1 H NMR (MeOD, 400MHz)} : δ 7.97 (d, J = 3.3 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.02-7.39 (m, 3H), 6.24 (s, 1H), 3.99-4.16 (m, 2H), 3.73-3.95 (m, 3H), 3.47 (t, J = 9.0 Hz, 2H), 3.02-3.25 (m, 3H), 2.68-2.97 (m, 2H), 2.10- 2.48 (m, 3H), 1.76 (br s, 2H), 1.23 (s, 6H), 1.13 ppm (t, J = 7.2 Hz, 3H). MS: Calcd: 633 (MH ⁺ ), Found 633 (MH ⁺ ).

Example 95

5- [7 - [[(4R) -4- (2-Chloro-4-fluoro-phenyl) -5-methoxycarbonyl-2-thiazol- Yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin-

Preparation of Example 95

(3-oxo-1,5,6,7,8,8a-hexahydro-pyrazino [l, 2-c] [1,3] oxazin- Carboxylic acid TFA salt (Compound 95-A), the title compound was prepared in analogy to example 1. &lt; 1 &gt; Example 95 (48 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 9.02 (s} , 1H), 8.17 (s, 2H), 8.01 (s, 1H), 7.88 (s, 1H), 7.51 to 7.54 (m, 1H) 2H), 4.17-4.35 (m, 3H), 3.51-3.75 (m, 2H), 7.30-7.23 (m, 7 H), 3.01-3.12 (m, 2H). MS: Calculated 626 (MH ^&lt; ⁺ & gt ^; ), found 626 (MH ^&lt; ⁺ & gt ^; ).

Preparation of 5- (3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl) pyridine-2-carboxylic acid (Compound 95-

Step 1: A solution of 5-bromopyridine-2-carboxylic acid (5.0 g, 24.75 mmol) in MeOH (30 mL) was added dropwise at 0 C to thionyl chloride (10 mL). The mixture was then stirred at 60 &lt; 0 &gt; C for 12 hours. After removal of the solvent and thionylchloride residues, the crude product methyl 5-bromopyridine-2-carboxylate was obtained and used in the next step without further purification.

Step 2: To a solution of methyl 5-bromopyridine-2-carboxylate (Compound 95-A-1, 0.72 g, 3.28 mmol), t- butyl 3- (Racemic compound M, 0.40 g, 1.64 mmol), bis (dibenzylideneacetone) palladium (94.4 mg, 0.164 mmol) in tetrahydrofuran A mixture of (±) -2,2'-bis (diphenylphosphino) -1,1'-binaphthyl (196.8 mg, 0.33 mmol) and cesium carbonate (160.4 mg, 4.92 mmol) Lt; / RTI &gt; After removal of the solvent, the residue was purified by column to give the product 95-A-2 as a white solid. MS: Calculated 377 (MH ^&lt; ⁺ & gt ^; ), found 377 (MH ^&lt; ⁺ & gt ^; ).

Step 3: A mixture of compound 95-A-2 (0.24 g, 0.64 mmol) and lithium hydroxide (0.13 g, 3.2 mmol) in water (2 mL) and MeOH (5 mL) was stirred at room temperature for 12 hours . The reaction mixture was then neutralized to pH 6 with 1 N HCl and extracted with ethyl acetate. The organic layer was dried over sodium sulfate. After removal of the solvent, the residue was treated with TFA (2 mL) in DCM (10 mL). The reaction mixture was stirred for 30 minutes and then the solvent was removed to give the crude product which was used directly in the next step. MS: Calculated 263 (MH ^&lt; ⁺ & gt ^; ), found 263 (MH ^&lt; ⁺ & gt ^; ).

Example 96

(S) -6- [(S) -2- (2-carboxy-2,2-difluoro-ethyl) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Methyl-4- (3,4-difluoro-2-methyl-phenyl) -2-thiazol-2-yl-1,4- dihydro-pyrimidine-

Preparation of Example 96

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4S) -6- (bromomethyl) -4- (3-tert-butoxycarbonylamino) propionic acid in place of the compound C) and hexahydro-pyrazino [ Methyl-phenyl) -2-thiazol-2-yl-1,4-dihydropyrimidine-5-carboxylate (Compound C-7) and 2,2-difluoro -Propionic acid trifluoroacetate salt (Compound 96-A) was used instead of (S) -3-oxo-hexahydro-imidazo [1,5- a] pyrazin- The title compound was prepared analogously. Example 96 (15 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 8.01 (d} , 1H), 7.90 (d, 1H), 7.26 (m, 1H), 7.07-7.15 (m, 1H), 5.94-5.98 (m, 2H), 3.62-3.80 (m, 4H), 3.41-3.52 (m, 2H), 4.69 (d, 1H), 3.07-3.22 (m, 3H), 2.52 (d, 3H), 1.15 (m, 3H). MS: Calculated 625 (MH ^&lt; ⁺ & gt ^; ), found 625 (MH ^&lt; ⁺ & gt ^; ).

(Compound 96-A) was reacted with 2,2-difluoro-3 - ((S) -3-oxo-hexahydro- imidazo [1,5- a] pyrazin- Manufacturing

Step 1: To a stirred solution of 3-amino-2,2-difluoro-propionic acid hydrochloride salt (400 mg, 1.10 mmol) in DCM (5 mL) at 0 C was added DIPEA (142 mg, 1.10 mmol) And a solution of compound S (350 mg, 1 mmol) in DCM (5 mL) was added successively. The reaction mixture was stirred at 0 &lt; 0 &gt; C for 5 minutes. NaBH (OAc) ₃ was then added to the mixture. The resulting mixture was stirred at room temperature overnight. The reaction mixture was partitioned between DCM and water. The organic layer was separated, dried over Na ₂ SO ₄ , concentrated in vacuo and isolated to give 320 mg of compound 96-A-1.

Step 2: A mixture of compound 96-A-1 (320 mg, 0.70 mmol) and Pd / C (30 mg) in MeOH (5 mL) was stirred overnight at room temperature with a balloon of hydrogen. The reaction mixture was filtered and the filtrate was concentrated. The crude product 96-A-2 (226 mg) was obtained and used in the next step without further purification.

Step 3: To a solution of 96-A-2 (crude, 226 mg, 0.70 mmol) in dichloromethane (3 ml) at 0 C was added DIPEA (0.6 mL, 3.50 mmol) followed by triphosgene , 0.35 mmol) was added to the reaction mixture. The resulting mixture was allowed to warm to room temperature and stirred overnight. The reaction mixture was concentrated and the residue was used directly in the next step. The amount of crude product 96-A-3 was 340 mg.

Step 4: To a solution of 96-A-3 (crude, 340 mg, 0.70 mmol) in dichloromethane (2 mL) was added trifluoroacetic acid (5 mL) at room temperature. The reaction mixture was stirred for 1.5 hours and then the solvent was removed to give crude product 96-A (260 mg) which was used directly in the next step.

Ethyl (4S) -6- (bromomethyl) -4- (3,4-difluoro-2-methyl-phenyl) -2-thiazol-2-yl-1,4-dihydropyrimidine- - &lt; / RTI &gt; carboxylate (Compound C-7)

Compound C-7 was prepared similarly to compound C using 3,4-difluoro-2-methylbenzaldehyde and ethyl acetoacetate instead of 2-chloro-4-fluorobenzaldehyde and methyl acetoacetate.

Examples 97A and 97B (two isolated isomers)

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Methyl] -2- (cyclopropylmethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid ; And

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2- (cyclopropylmethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid

Preparation of Examples 97A and 97B

Instead of trans-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- - a-methyl-2- (cyclopropylmethyl) -3-oxo -1,5,6,7,8,8a- hexahydro-imidazo [1,5-a] pyrazin-8-carboxylate (compound 97-C) , The title compound was prepared in analogy to example 82A and 82B.

Example 97A (25 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.98 (d} , J = 3.0 Hz, 1H), 7.78 (d, J = 3.0 Hz, 1H), 7.35-7.26 (m, 2H), 7.20-7.11 (m, 2H), 3.81 (d , J = 11.5 Hz, 1H), 6.30 (s, 3.68 (d, J = 8.0 Hz , 1H), 3.65-3.58 (m, 1H), 3.37-3.34 (m, 2H), 3.25-3.16 (m, 1H), 3.25-3.16 (m, 1H), 3.15- 3.07 (m, 2H), 2.91 (d, J = 11.5 Hz, 1H), 2.60-2.49 (m, 1H), 1.13 (t, J = 7.2 Hz, 3H), 1.03-0.93 (m, 1H), 0.61 -0.53 (m, 2H), 0.28-0.23 (m, 2H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Example 97B (19 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.33-7.23 (m} , 3H), 7.15 (t, J = 8.3 Hz, 1H), 6.22 (s, 1H), 4.12-4.02 (m, 3H) 2H), 2.93 (m, 2H), 3.95-3.84 (m, 3H), 3.52 (t , J = 8.9 Hz, , J = 11.0 Hz, 1H) , 2.84 (d, J = 8.5 Hz, 1H), 2.48 (d, J = 0.8 Hz, 3H), 2.37 (dt, J = 3.4, 11.6 Hz, 1H), 2.18 (t , J = 10.9 Hz, 1H), 1.21 (d , J = 3.0 Hz, 6H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calculated 617 (MH ^&lt; ⁺ & gt ^; ), found 617 (MH ^&lt; ⁺ & gt ^; ).

Example 97A was synthesized from compound 97A-1 (more rapid elution) in Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and Example 97B was synthesized from compound 97B-1 Slow elution).

Trance - Preparation of methyl 2- (cyclopropylmethyl) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (Compound 97-

Compound 97-C was prepared similarly to compound 82-C using cyclopropylmethanamine instead of cyclopropylamine.

Example 98

(3-fluoro-phenyl) -5-ethoxycarbonyl-2- (4-methylthiazol-2-yl) -1,4-dihydropyrimidin-6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazin- 2,2-dimethyl-propanoic acid

Preparation of Example 98

(R) -6- bromo-4- (2-chloro-4-fluoro-phenyl) -2-thiazol-2-yl-1,4-dihydro-pyrimidine-5-carboxylic acid methyl ester ( (4R) -6- (bromomethyl) -4- (2-methoxyphenyl) propionic acid ethyl ester was used in the place of compound C) and hexahydro-pyrazino [ (Compound C-8) and 3 - [(8aS) -2-methyl-thiazol- ) -3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-2-yl] -2,2-dimethyl- The title compound was prepared in analogy to example 1. &lt; RTI ID = 0.0 &gt; Example 93 (60 mg) was obtained as a light yellow solid. ^{1 H NMR (400MHz, MeOD)} δ 7.33-7.23 (m, 3H), 7.15 (t, J = 8.3 Hz, 1H), 6.22 (s, 1H), 4.12-4.02 (m, 3H), 3.95-3.84 ( m, 3H), 3.52 (t , J = 8.9 Hz, 1H), 3.44-3.38 (m, 1H), 3.29 (s, 1H), 3.24-3.09 (m, 2H), 2.93 (d, J = 11.0 Hz , 1H), 2.84 (d, J = 8.5 Hz, 1H), 2.48 (d, J = 0.8 Hz, 3H), 2.37 (dt, J = 3.4, 11.6 Hz, 1H), 2.18 (t, J = 10.9 Hz , 1H), 1.21 (d , J = 3.0 Hz, 6H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calcd: 633 (MH ⁺ ), Found 633 (MH ⁺ ).

Chloro-3-fluoro-phenyl) -2- (4-methylthiazol-2-yl) -1,4-dihydropyrimidine -5-carboxylate (Compound C-8)

Compound C-8 was prepared analogously to compound C using 4-methylthiazole-2-carbonitrile and ethyl acetoacetate instead of thiazole-2-carbonitrile and methyl acetoacetate.

Example 99

2 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl-2-thiazol- Methyl] -6-oxo-1,3,4,7,8,8a-hexahydropyrrolo [1,2-a] pyrazine-1-carboxylic acid (mixture of two isomers)

Preparation of Example 99

Trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (Compound 99-A) instead of trans - 6-oxo-2,3,4,7,8,8a-hexahydro-lH-pyrrolo [ , The title compound was prepared in analogy to example 82A and 82B. As a mixture of the two isomers, Example 99 (light yellow solid, 79 mg) was obtained. ^{1 H NMR (400MHz, MeOD)} δ 7.95 (d, J = 3.0 Hz, 1H), 7.75 (d, J = 3.3 Hz, 1H), 7.35-7.26 (m, 2H), 7.17 (t, J = 8.2 Hz , 1H), 6.22 (s, 1H), 4.25 (d, J = 17.1 Hz, 1H), 4.08-4.01 (m, 3H), 3.98 (s, 2H), 3.20-3.09 (m, 3H), 2.61 ( 1H , J = 12.7 Hz, 1H), 2.52-2.42 (m, 2H), 2.34-2.23 (m, 1H), 2.08-1.97 (m, 1H), 1.12 (t , J = 7.2 Hz, 3H). MS: Calcd. 562 (MH ⁺ ), Measurement 562 (MH ⁺ ).

Trance - Preparation of 6-oxo-2,3,4,7,8,8a-hexahydro-lH-pyrrolo [1,2-a] pyrazine-1-carboxylic acid (Compound 99-

Step 1 : To a solution of &lt; RTI ID = 0.0 &gt; To the stirred solution of 82-C-2 (12 g, 32.3 mmol) was added TEA (6.6 g, 64.5 mmol) and (12.3 g, 35.5 mmol). The mixture was stirred at 25 &lt; 0 &gt; C for 15 hours. Water (100 mL) was added and the mixture was extracted with DCM (100 mL). The organic layer was separated and dried over Na ₂ SO _4. The solvent was removed and the residue was purified by column to give compound 99-A-1 (10 g). _{^{1 H NMR (400MHz, CDCl 3}} ) δ 4.90-4.76 (m, 1H), 4.71-4.48 (m, 1H), 4.24-4.08 (m, 2H), 4.03-3.90 (m, 1H), 3.85-3.71 ( 1H), 1.98-1.80 (m, 1H), 1.57-1.40 (m, 1H), 3.21-2.87 (m, 2H), 2.31 (dq , J = 8.5, 16.5 Hz, 2H) m, 21H), 1.33-1.23 (m, 3H).

Step 2 : To a solution of compound &lt; RTI ID = 0.0 &gt; To a stirred solution of 99-A-1 (20 g, 45.2 mmol) was added Pd / C (10 g). The mixture was stirred at 30 &lt; 0 &gt; C (50 Psi) for 15 hours. The mixture was filtered and the solvent removed in vacuo to give a crude product which was purified by column to give compound 99-A-2 (17 g, crude).

Step 3 : TFA (180 mL) was added to a stirred solution of compound 99-A-2 (17 g, 38.2 mmol) in anhydrous DCM (90 mL). The reaction mixture was stirred for 3 hours and then the solvent was removed in vacuo to give the crude product 99-A-3 (19 g, crude).

Step 4 : DIPEA (16 g, 125.6 mmol) was added to a stirred solution of 99-A-3 (11 g, 25.1 mmol) in anhydrous DCM (250 mL). The mixture was refluxed for 4 hours and then the solvent was removed to give the crude product 99-A (7 g) which was used directly in the next step.

Examples 101A and 101B (two isolated isomers)

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- 6-yl] methyl] -2-isobutyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5-a] pyrazine-8-carboxylic acid; And

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -2-isobutyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-8-carboxylic acid

Preparation of Examples 101A and 101B

Instead of trans-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- -methyl-2-isobutyl-3-oxo-hexahydro--1,5,6,7,8,8a- performed already using imidazo [1,5-a] pyrazin-8-carboxylate (compound C-101) Two title compounds were prepared analogously to Examples 82A and 82B.

Example 101A (10 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.98 (d} , J = 3.3 Hz, 1H), 7.78 (d, J = 3.3 Hz, 1H), 7.34-7.27 (m, 2H), 7.19-7.13 (m, 1H), 6.25 (s, 1H), 4.31 (d , J = 17.1 Hz, 1H), 4.09-4.01 (m, 2H), 3.94-3.86 ), 3.60-3.48 (m, 2H) , 3.29 (d, J = 9.5 Hz, 1H), 3.25-3.16 (m, 1H), 3.10-2.98 (m, 2H), 2.90 (d, J = 11.0 Hz, 1H), 2.57-2.45 (m, 1H), 1.99-1.88 (m, 1H), 1.13 (t , J = 7.0 Hz, 3H), 0.95 (dd , J = 4.9, 6.7 Hz, 6H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

Example 101B (14 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.36-7.27 (m, 2H), 7.19-7.14 (m, 2H), 3.59-3.45 (m, 2H), 6.21 (s, 1H), 4.24 (d , J = 16.8 Hz, 1H), 4.07-3.93 ), 3.29-3.18 (m, 2H) , 3.03 (dd, J = 7.5, 11.0 Hz, 3H), 2.66-2.56 (m, 1H), 1.98-1.88 (m, 1H), 1.12 (t, J = 7.0 Hz, 3H), 0.94 (d , J = 6.8 Hz, 6H). MS: Calculated 619 (MH ^&lt; ⁺ & gt ^; ), found 619 (MH ^&lt; ⁺ & gt ^; ).

Example 101A was synthesized from Compound 101A-1 (more rapid elution) in Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and Example 101B was synthesized from Compound 101B-1 Slow elution).

Preparation of trans-methyl 2-isobutyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8-carboxylate (Compound 101-C)

Compound 101-C was prepared similarly to compound 82-C using 2-methylpropan-1-amine instead of cyclopropylamine.

Examples 102A and 102B (two isolated isomers)

(8R, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- 6-yl] methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-oxazolo [3,4-a] pyrazine-8-carboxylic acid; And

(8S, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Methyl] -3-oxo-5,6,8,8a-tetrahydro-1H-oxazolo [3,4-a] pyrazine-8-carboxylic acid

Preparation of Examples 102A and 102B

Instead of trans-methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- - methyl 3-oxo -1,5,6,7,8,8a- hexahydro-oxazolo [3,4-a] pyrazin-8-carboxylate in example 82A and 82B using a (compound 102-C) Similarly, two title compounds were prepared.

Example 102A (29 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.78 (d, J = 3.0 Hz, 1H), 7.35-7.27 (m, 2H), 7.20-7.13 (m, 1H), 6.26 ( s, 1H), 4.63-4.53 (m, 1H), 4.44 (dd, J = 6.0, 9.3 Hz, 1H), 4.28 (d, J = 17.1 Hz, 1H), 4.15- 3.97 (m, 4H), 3.77 (dd, J = 2.3, 13.3 Hz, 1H), 3.47 (d, J = 9.8 Hz, 1H), 3.30 (d, J = 3.5 Hz, 1H), 2.96 (dd, J = 2.1, 12.2 Hz, 1H), 2.68-2.58 (m, 1H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calcd. 564 (MH ⁺ ), Measurement 564 (MH ⁺ ).

Example 102B (27 mg) was obtained as a light yellow solid. ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.3 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.35-7.28 (m, 2H), 7.20-7.14 (m, 1H), 6.23 (s, 1H), 4.61-4.53 (m, 1H), 4.40 (dd , J = 6.3,9.3 Hz, 1H), 4.23-4.17 , 4H), 3.80 (dd, J = 2.5, 13.6 Hz, 1H), 3.46 (d, J = 9.8 Hz, 1H), 3.39-3.27 (m, 1H), 3.08 (dd, J = 2.3, 12.3 Hz, 1H), 2.73 (dt , J = 3.6, 12.2 Hz, 1H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calcd. 564 (MH ⁺ ), Measurement 564 (MH ⁺ ).

Example 102A was synthesized from Compound 102A-1 (more rapid elution) in Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ and compound 102B was synthesized from compound 012B-1 Slow elution).

Trance - Preparation of methyl 3-oxo-1,5,6,7,8,8a-hexahydrooxazolo [3,4-a] pyrazine-8-carboxylate (Compound 102-C)

Step 1 : To a stirred solution of 82-C-1 (8.6 g, 23 mmol) and pyridine (3.64 g, 46 mmol) in DCM (80 mL) at 0 C was added (4-nitrophenyl ) Carbon black chloridate (6.95 g, 34.5 mmol) in dichloromethane was added. The mixture was then warmed to room temperature and stirred for about 2 to 3 hours. The solvent was diluted with DCM (100 mL) and the mixture was washed sequentially with 0.6 N HCl (50 mL), aqueous NaHCO ₃ (50 mL) and brine. The organic layer was dried with Na ₂ SO _4, filtered and concentrated in vacuo. The crude product obtained was purified by silica column chromatography to give the product 102-C-1 (9.5 g). ^{1 H NMR (400 MHz, CDCl} 3) d ppm 8.30 (d, J = 8.8 Hz, 2H), 7.43 (t, J = 8.5 Hz, 2H), 5.30-5.09 (m, 1H), 4.88-4.71 (m (M, IH), 4.51-4.23 (m, 2H), 4.08-3.93 (m, IH), 3.91-3.77 (m, 5H), 3.33-2.97 -1.47 (t, 18 H).

Step 2: To a solution of compound 102-C-1 (9.5 g, 17.6 mmol) in DCM (70 mL) was added TFA (70 mL) at room temperature. The mixture was then stirred for about 3 hours. The solvent was removed under reduced pressure to give the crude product 102-C-2 (10 g crude) as a TFA salt, which was used in the next step without further purification.

Step 3: DIPEA (28 mL) was added at room temperature to a stirred solution of compound 102-C-2 (crude, 10 g, 17.6 mmol) in DCM (160 mL). The mixture was then heated to reflux and stirred for about 4 hours. The crude product was purified by silica column chromatography to give the title compound 102-C (2 g). MS: Calcd 201 (MH ⁺ ), found 201 (MH ⁺ ).

Examples 103A and 103B (two isolated single isomers)

Ethyl (4R) -6 - [[(8R, 8aS) -2-t-butyl-8- (hydroxymethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ , 5- a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- Rate; And

Ethyl (4R) -6 - [[(8S, 8aR) -2-t-butyl-8- (hydroxymethyl) -3-oxo-5,6,8,8a-tetrahydro- , 5- a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- Rate

Preparation of Examples 103A and 103B

Instead of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- carboxylate (Compound 82- - ( 2 -t- butyl-8- (hydroxymethyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5- a] pyrazin- Lt; / RTI &gt; was prepared in analogy to Examples 82A-1 and 82B-1.

Example 103A (43 mg) was obtained as a light yellow solid (eluted faster on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.95 (d} , J = 3.0 Hz, 1H), 7.74 (d, J = 3.0 Hz, 1H), 7.35-7.26 (m, 2H), 7.19-7.11 (m, 1H), 6.25 ( s, 1H), 4.43 (d, J = 17.6 Hz, 1H), 4.13-4.01 (m, 3H), 3.97-3.84 (m, 1H), 3.75 (dd, J = 4.0 J = 7.2, 8.7 Hz, 1H), 3.01 (dt , J = 3.1, 12.4 Hz, 1H), 3.69-3.60 (m, 2H), 3.58-3.51 1H), 2.81-2.71 (m, 1H), 2.53-2.41 (m, 2H), 1.39 (s, 9H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Example 10OB (25 mg) was obtained as a light yellow solid (eluted more slowly on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.98-7.92 (m} , 1H), 7.77-7.70 (m, 1H), 7.33-7.23 (m, 2H), 7.19-7.11 (m, 1H), 1H), 3.26 (dd , J = 7.8 Hz, 1H), 6.24 (d , J = 7.4, 8.7 Hz, 1H), 3.07-2.99 (m, 1H), 2.94 (d , J = 11.8 Hz, 1H), 2.61 (dt , J = 3.5, 11.8 Hz, 1H), 2.50-2.40 , 1.39 (s, 9H), 1.16-1. 10 (m, 3H). MS: Calcd. 605 (MH ⁺ ), Measurement 605 (MH ⁺ ).

Trance - Preparation of methyl 3-oxo-1,5,6,7,8,8a-hexahydrooxazolo [3,4-a] pyrazine-8-carboxylate (Compound 102-C)

Step 1: LiOH.H ₂ O (1.26 g, 30 mmol) in H ₂ O (10 mL) was added to a solution of 92-C-1 (3.55 g, 10 mmol) in methanol (40 mL) . The mixture was stirred at room temperature for 5 hours, then the methanol was removed under reduced pressure and the mixture was adjusted to pH 5 with 2 N HCl solution. The mixture was extracted with ethyl acetate (50 mL, 3 times). The combined organic phases were dried and concentrated to give crude product 103-C-1 (3.14 g) which was used in the next step without further purification. MS: Calcd. 342 (MH ⁺ ), Measurement 342 (MH ⁺ ).

Step 2: BH ₃ .THF (1 M in THF, 30 mL) was added at room temperature to a solution of 103-C-1 (3 g, 8.8 mmol) in THF (20 mL). The reaction mixture was refluxed for 3 hours and then it was cooled to 0 &lt; 0 &gt; C. Methanol was slowly added to the previous reaction mixture to quench the reaction product. The solvent was removed and the residue was purified by column chromatography to give the product 103-C-2 (2.47 g). MS: Calculated 328 (MH ^&lt; ⁺ & gt ^; ), found 328 (MH ^&lt; ⁺ & gt ^; ).

Step 3: TFA (2 mL) was added to a stirred solution of 103-C-2 (2 g, 6.1 mmol) in CH ₂ Cl ₂ (20 mL) at room temperature. After 3 hours, LC-MS indicated that the starting material had been consumed. The solvent was removed to give the crude product 103-C which was used in the next step without further purification. MS: Calcd. 228 (MH ⁺ ), found 228 (MH ⁺ ).

Examples 104A and 104B (two isolated single isomers)

(4R) -6- [[(8aR) -2-Isopropyl-3-oxo-5,6,8,8a-tetrahydro- 1 H- imidazo [1,5- a] pyrazin- Methyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-2-yl-l, 4-dihydropyrimidine-5-carboxylate; And

(4R) -6- [[(8aS) -2-Isopropyl-3-oxo-5,6,8,8a-tetrahydro- IH- imidazo [1,5- a] pyrazin- Methyl] -4- (2-chloro-3-fluoro-phenyl) -2-thiazol-

Preparation of Examples 104A and 104B

Instead of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- 1 &gt; and 82B-l (l-tert-butoxycarbonylamino) -isopropyl- l, 5,6,7,8,8a-hexahydroimidazo [ , 2 &lt; / RTI &gt; title compounds were prepared.

Example 104A (71 mg) was obtained as a light yellow solid (eluted faster on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.3 Hz, 1H), 7.75 (d, J = 3.0 Hz, 1H), 7.32-7.24 (m, 2H), 7.15 (t J = 8.3 Hz, 1H), 6.24 (s, 1H), 4.12-4.01 (m, 4H), 3.94-3.85 (m, 2H), 3.80 (dd , J = 2.0, 13.3 Hz, 1H) t, J = 8.9 Hz, 1H ), 3.18-3.04 (m, 2H), 2.99 (dd, J = 2.8, 10.8 Hz, 1H), 2.79-2.67 (m, 1H), 2.29 (t, J = 10.9 Hz , &Lt; / RTI &gt; 1H), 2.25-2.17 (m, 1H), 1.20-1.10 (m, 9H). MS: Calcd. 561 (MH ⁺ ), Measurement 561 (MH ⁺ ).

Example 104B (77 mg) was obtained as a light yellow solid (eluted more slowly on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.1 Hz, 1H), 7.75 (d, J = 3.3 Hz, 1H), 7.33-7.23 (m, 2H), 7.15 (t J = 8.5 Hz, 1H), 6.24 (s, 1H), 4.13-4.00 (m, 4H), 3.94-3.83 (m, 3H), 3.45 (t , J = 8.9 Hz, 1H), 3.22-3.12 m, 1H), 3.00 (dd , J = 4.0, 9.3 Hz, 1H), 2.93-2.80 (m, 2H), 2.34 (dt, J = 3.4, 11.6 Hz, 1H), 2.15 (t, J = 10.9 Hz , &Lt; / RTI &gt; 1H), 1.18-1.09 (m, 9H). MS: Calcd. 561 (MH ⁺ ), Measurement 561 (MH ⁺ ).

Preparation of 2-isopropyl-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-3-one (Compound 104-C)

(Compound 104-C-1) (1 - tert - Butyl-2-isopropyl-3-oxo-5,6,8,8a-tetrahydro- mmol) was dissolved in CH ₂ Cl ₂ (3 mL) and TFA (1 mL) was slowly added at 0 ° C. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give the crude product 104-C which was used directly in the next step.

t- Preparation of butyl 2-isopropyl-3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [l, 5-a] pyrazine-7-carboxylate (Compound 104-

Compound 104-C-1 was prepared similarly to compound 67-D using iso-propylamine instead of 2-aminoethanol.

Examples 105A and 105B (two isolated isomers)

(8R, 8aS) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5- ethoxycarbonyl-2-thiazol- Yl] methyl] -2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ Pyrazine-8-carboxylic acid; And

(8S, 8aR) -7 - [[(4R) -4- (2-Chloro-3-fluoro-phenyl) -5-ethoxycarbonyl- Yl] methyl] -2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [ Pyrazine-8-carboxylic acid

Preparation of Examples 105A and 105B

Instead of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- - (2,2-difluoroethyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-3-one (Compound 105-C) Two title compounds were prepared analogously to Examples 82A-1 and 82B-1.

Example 105A (22 mg) was obtained as a light yellow solid (eluted faster on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.77 (d, J = 3.0 Hz, 1H), 7.34-7.26 (m, 2H), 7.19-7.12 (m, 1H), 6.25 (s, 1H), 6.17-5.83 (m, 1H), 4.31 (d , J = 17.1 Hz, 1H), 4.08-4.00 (m, 2H), 3.96-3.86 ), 3.80 (dd , J = 2.0,13.6 Hz, 1H), 3.74-3.68 (m, 1H), 3.66-3.56 (m, 3H), 3.28-3.16 ), 2.53 (dt , J = 3.4, 12.0 Hz, 1H), 1.13 (t , J = 7.2 Hz, 3H). MS: Calculated 627 (MH ^&lt; ⁺ & gt ^; ), found 627 (MH ^&lt; ⁺ & gt ^; ).

Example 10OB (22 mg) was obtained as a light yellow solid (eluted more slowly on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.0 Hz, 1H), 7.35-7.27 (m, 2H), 7.17 (t , J = 8.1 Hz, 1H) , 6.21 (s, 1H), 6.16-5.83 (m, 1H), 4.23 (d, J = 16.6 Hz, 1H), 4.06-4.00 (m, 2H), 3.98-3.81 ( m, 3H), 3.72-3.66 (m , 1H), 3.65-3.55 (m, 3H), 3.29-3.17 (m, 2H), 3.04 (d, J = 10.3 Hz, 1H), 2.66-2.54 (m, 1H), 1.12 (t , J = 7.2 Hz, 3H). MS: Calculated 627 (MH ^&lt; ⁺ & gt ^; ), found 627 (MH ^&lt; ⁺ & gt ^; ).

Preparation of 2- (2,2-difluoroethyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin-3-one (Compound 105-C)

t- butyl 2- (2,2-difluoro-ethyl) -3-oxo-tetrahydro--5,6,8,8a- -1H- imidazo [1,5-a] pyrazine-7-carboxylate (compound 105-C-1 ) (1 mmol) was dissolved in CH ₂ Cl ₂ (3 mL) and TFA (1 mL) was slowly added at 0 ° C. The reaction mixture was stirred at room temperature for 1 hour and then the solvent was removed in vacuo to give the crude product 105-C which was used directly in the next step.

t- Butyl 2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine-7- ( Preparation of Compound 105-C-1)

Compound 105-C-1 was prepared similarly to compound 67-D using 2,2-difluoroethanamine instead of 2-aminoethanol.

Examples 106A and 106B (two isolated isomers)

Methyl-propyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1, 5-a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol- ; And

Methyl-propyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [l, 5-a] pyrazin-7-yl] methyl] -4- (2-chloro-3-fluoro-phenyl) -2- thiazol-

Preparation of Examples 106A and 106B

Instead of trans - methyl 2-cyclopropyl-3-oxo-1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazine-8- - (2-hydroxy-2-methyl-propyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin- The title compound was prepared in analogy to example 82A-1 and 82B-1.

Example 106A (18 mg) was obtained as a light yellow solid (eluted more rapidly on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.96 (d} , J = 3.0 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.33-7.24 (m, 2H), 7.15 (t J = 8.2 Hz, 1H), 6.25 (s, 1H), 4.14-4.01 (m, 3H), 3.97-3.88 (m, 2H), 3.80 (dd , J = 2.0, 3.69 (m, 1H), 3.36 (d, J = 4.3 Hz, 1H), 3.24-3.15 (m, 2H), 3.13-3.07 (m, 1H), 3.01 (dd, J = 2.9, 10.9 Hz, 1H) , 2.76 (d, J = 11.3 Hz, 1H), 2.36 (t, J = 10.9 Hz, 1H), 2.22 (dt, J = 3.1, 11.6 Hz, 1H), 1.22 (s, 6H), 1.13 (t, J = 7.2 Hz, 3 H). MS: Calculated 591 (MH ^&lt; ⁺ & gt ^; ), found 591 (MH ^&lt; ⁺ & gt ^; ).

Example 26B (26 mg) was obtained as a light yellow solid (eluted more slowly on a Chiralpak AD-3 column eluting with 30% isopropanol (0.05% DEA) / CO ₂ ). ¹ H NMR (400 MHz, methanol _{-d 4) d ppm 7.97 (d} , J = 3.3 Hz, 1H), 7.76 (d, J = 3.3 Hz, 1H), 7.34-7.24 (m, 2H), 7.16 (t , J = 8.2 Hz, 1H) , 6.24 (s, 1H), 4.13-4.01 (m, 3H), 3.96-3.84 (m, 3H), 3.66 (t, J = 9.2 Hz, 1H), 3.30-3.16 ( m, 3H), 3.14-3.03 (m , 1H), 2.95-2.83 (m, 2H), 2.36 (dt, J = 3.4, 11.6 Hz, 1H), 2.22 (t, J = 10.9 Hz, 1H), 1.21 (s, 6H), 1.13 (t , J = 7.0 Hz, 3H). MS: Calculated 591 (MH ^&lt; ⁺ & gt ^; ), found 591 (MH ^&lt; ⁺ & gt ^; ).

A solution of 2- (2-hydroxy-2-methyl-propyl) -1,5,6,7,8,8a-hexahydroimidazo [1,5-a] pyrazin- Produce

t- butyl 2- (2-hydroxy-2-methyl-propyl) -3-oxo-tetrahydro--5,6,8,8a- -1H- imidazo [1,5-a] pyrazine-7-carboxylate (Compound 106-C-1) (1 mmol) was dissolved in CH ₂ Cl ₂ (3 mL) and TFA (1 mL) was slowly added at 0 ° C. After the reaction mixture was stirred at room temperature for 1 hour, the solvent was removed in vacuo to give crude product 106-C which was used directly in the next step.

t- Butyl 2- (2,2-difluoroethyl) -3-oxo-5,6,8,8a-tetrahydro-1H-imidazo [1,5- a] pyrazine- 7- carboxylate (Compound 106- C-1)

Compound 105-C-1 was prepared similarly to compound 67-D using 1-amino-2-methyl-propan-2-ol instead of 2-aminoethanol.

Example 107: HBV inhibition assay

Cell and culture conditions

HepG2.2.15 and HepDE19 are stably transfected cell lines containing the HBV genome. Both cell lines are described by MA Selles et al., Proc. Natl. Acad. Sci. USA Hepatocellular carcinoma cell line Hep G2 (American Type Culture Collection, ATCC (registered trademark)) by the published procedure described in US Provisional Patent Application Serial No. 10 / Trademark) HB-8065 (trademark). Two cell lines were maintained in Dulbecco's modified Eagle's medium (DMEM) -F12 medium supplemented with 10% fetal bovine serum, 100 U / mL penicillin, 100 ug / mL streptomycin and 0.5 mg / mL G418.

HepG2.2.15 cells essentially support HBV replication and viral particle production, whereas HepDE19 cells are inducible by tetracycline. Addition of 1 μg / mL tetracycline in the culture medium inhibits HBV replication in HepDE19 cells, while switching to tetracycline-free medium restarts this process.

In vitro anti-HBV activity

HepG2.2.15 cells were seeded into 96-well plates (3 x 10 ⁴ cells in 100 μL medium per well) and incubated overnight at 37 ° C. The test compound was diluted with a series of semi-log in DMSO and then diluted 100-fold in the culture medium. The diluted compound (100 [mu] L) was added to the plate and the final concentration of DMSO in all wells reached 0.5%. After 5 days of compound treatment, the culture supernatant was collected for further analysis.

For quantitative PCR detection of extracellular HBV DNA, the culture supernatant (100 μL) was collected and processed in a MagNA Pure 96 nucleic acid purification system (Roche Applied Science) for viral DNA extraction. The extracted samples were used for quantification of HBV DNA by qPCR. Effective compound concentrations (EC ₅₀ ) with 50% inhibition of HBV replication were measured as shown in Table 1. [

Compounds of the present invention were tested for their ability to inhibit HBV activity and activation as described herein. The examples were tested in this assay as described herein and the Hep 50.2.15 assay was found to have an EC ₅₀ of less than 0.2 μM. Certain compounds of formula I or other compounds of the invention have been found to have an EC ₅₀ of less than 0.02 μM when analyzed by HepG2.2.15.

[Table 1]

Anti-HBV activity data of a specific compound in HepG2.2.15 cells

Cytotoxicity and selectivity index

HepDE 19 cells were seeded into 96-well plates (5 x 10 ³ cells per well) and treated with compounds for EC ₅₀ determinations. After 5 days of treatment, CCK-8 reagent (20 [mu] L) was added to measure cell viability. After incubation at 37 ° C for 2 hours, the absorbance at 450 nm and 630 nm (OD ₄₅₀ and OD ₆₃₀ ) was recorded with a plate reader. The concentration (CC ₅₀ ) causing 50% kill of the host cells of each compound was determined.

The relative effect of compounds inhibiting viral replication as compared to inducing apoptosis was defined as the selectivity index (CC ₅₀ value / EC ₅₀ value). The selectivity index was measured based on CC ₅₀ and EC ₅₀ data.

The results of CC ₅₀ and corresponding selectivities are shown in Table 2 below.

[Table 2]

The CC ₅₀ and selectivity index of a particular compound

Example 108: Human microsomal metabolic stability

Human microsomes (BD Gentest) were pre-incubated with test compounds in 100 mM phosphate buffer (pH 7.4) for 10 min at 37 [deg.] C. The reaction was initiated by addition of NADPH or NADPH regeneration system to give a final thermostatted volume (400 μL). For the NADPH system, final incubation contained 1 μM test compound, 0.5 mg / mL hepatic microsomal protein, 1 mM NADPH in 100 mM phosphate buffer (pH 7.4). For the NADPH regeneration system, the final incubation was performed in the presence of 1 μM test compound, 0.5 mg / mL liver microsomal protein, 3 mM glucose 6-phosphate, 1 mM NADP, 3 mM MgCl ₂ and 0.05 mg / mL glucose 6-phosphate dehydrogenase. After incubation times of 0, 3, 6, 9, 15 and 30 minutes at 37 占 폚, one sample was obtained from each time point and each sample (50 占)) was removed and transferred to a methanol solution (150 占 고) , Which was maintained at 4 [deg.] C and contained 2 [mu] M tolbutamide as an internal standard. After precipitation and centrifugation, the amount of the compound remaining in the sample was measured by LC-MS / MS. Controls without or with NADPH regeneration system at 0 and 30 min were also prepared and analyzed.

The results of metabolic stability studies in human microsomes are shown in Table 3 below.

[Table 3]

Metabolic stability in human microsomes

Example 109: Lysa solubility

Duplicate samples were prepared from 10 mM DMSO stock solutions. After evaporation of the DMSO with a centrifugal vacuum evaporator, the residue was dissolved in 0.05 M phosphate buffer (pH 6.5), stirred for 1 hour and shaken for 2 hours. After one night, the solution was filtered using a microtiter filter plate. The filtrate and its 1/10 dilution were then analyzed by direct UV measurement or by HPLC-UV. A 4-point calibration curve was also prepared from the 10 mM stock solution and used for solubility measurement of the compound. The results were expressed in μg / mL. If the% of the sample measured in solution after evaporation divided by the calculated maximum sample amount exceeds 80%, the solubility is recorded as being greater than this value.

The results of Lysa are shown in Table 4 below.

[Table 4]

The solubility data of a particular compound

Example 110: Cytochrome P450 (Cyp450) -induced screening assay-mRNA induction

material

Cell culture

Cold-preserved human hepatocytes (Life Technologies, Carlsbad, USA) were thawed and cultured in collagen I-coated 96-well plates at a density of 52,000 cells / well. After attachment, the medium was changed and the cells were pre-incubated overnight in hepatocyte maintenance medium (HMM; Lonza, Switzerland).

Test compounds were administered to the cells the following morning at the indicated concentrations (less than 10 [mu] M) in HMM culture medium containing gentamicin and constant 0.1% DMSO. Similarly, the positive inducer compounds omeprazole (prototype of human CYP1A2 prototype; final concentrations: 1 and 10 μM), phenobarbital (prototype inducer of human CYP2B6; final concentrations 100 and 1000 μM) and rifampicin (prototype inducer of human CYP3A4; Concentration: 1 and 10 [mu] M) was prepared from 1000-fold DMSO stock solution in HMM containing gentamycin. Subsequently, medium exchange was performed and the cells were exposed to the test compound, positive inducer compound, or vehicle (0.1% DMSO), respectively, for 24 hours.

At the end of the compound exposure period, the media was removed and the cells were lysed using 100 μL / well MagNA pure LC RNA isolation tissue lysis buffer (Roche Diagnostics AG, Rothschild, Switzerland). The plate was then sealed and frozen at -80 DEG C until further post treatment.

mRNA isolation, processing and qRT-PCR

The thawed samples were diluted 1: 1 in PBS using the MagNA Pure 96 system (Roche Diagnostics, Rottweil, Switzerland) and the RNA bulk kit of each cell (Roche Diagnostics AG, Rothschild, Switzerland) mRNA isolation was performed. Cell lysis volume and 100 μL elution volume were used. The resulting mRNA suspension (20 μL) was then used for reverse transcription using a transcript (20 μL) or a first strand cDNA synthesis kit (Roche prime Supply, Mannheim, Germany). The resulting cDNA was diluted with H ₂ O (40 μL) before use in qRT-PCR. qRT-PCR was performed using a forward primer and reverse primer, the corresponding UPL (all available from Microsynth, Vogel, Switzerland) and a Taqman Fast advanced master mix (Applied Biosystems) ) On an ABI 7900 machine (Applied Biosystems).

Calculation

The qRT-PCR Ct-values for each P450 were expressed relative to the Ct-values of the same sample of RN18S1 (Microsyn, Switzerland, Valgat). Thus, each? T-value was calculated. The ΔΔct-value for each sample was calculated using the average of all Δct-values for the vehicle control sample (ΔΔct-value (sample) = Δct-value (sample) - average of Δct-values of all vehicle controls ). The multiple induction of each sample was calculated as 2 ^ (- ΔΔct). Individual drainage values were then averaged per treatment condition (typically n = 3 biological replicates).

The relative induction values for each positive inducer compound condition (10 [mu] M omeprazole for CYP1A2, 1000 [mu] M phenobarbital for CYP2B6 and 10 [mu] M rifampicin for CYP3A4) were then calculated from the multiple derived values as follows:

Relative Induction (%) = 100 x (T-V) / (P-V)

In this formula,

T is a multiple induction of test compound conditions;

P is a multiple induction of the positive inducer compound;

V is the drainage induction of the vehicle control.

The results of CYP3A4 induction are shown in Table 5 below.

[Table 5]

Relative Induced Values of Specific Compounds for 10 μM Rifampicin

Claims (3)

A compound of the formula IAA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,
(IAA)

In this formula,
R ¹ is chloro or methyl;
R ² is hydrogen or fluoro;
R &lt; ³ &gt; is hydrogen or fluoro;
R &lt; ⁴ &gt; is methyl or ethyl;
R &lt; ⁵ &gt; is hydrogen or carboxy;
R &lt; ⁶ &gt; is hydrogen;
R ⁷ is methyl, isopropyl, t-butyl, cyclopropyl, carboxy (gemidemethyl) ethyl, carboxy (gemidemethyl) propyl, carboxycyclopropylmethyl, carboxycyclobutylmethyl or carboxyphenyl. A compound of the formula IAA, or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof,
(IAA)

In this formula,
R ¹ is halogen or C _{1- 6} alkyl;
R &lt; ² &gt; is hydrogen or halogen;
R &lt; ³ &gt; is hydrogen or halogen;
R ⁴ is C _{1- 6} alkyl;
R &lt; ⁵ &gt; is hydrogen or carboxy;
R &lt; ⁶ &gt; is hydrogen;
R ⁷ is C _{1- 6} alkyl, halo C _{1 - 6} alkyl, C _{3- 7 cycloalkyl, -C m H 2m -COOH, -C} m H 2m -C 3- 7 cycloalkyl, -COOH or a carboxy-phenyl;
m is 1 to 6; Claims 1. A compound of formula (IAB), or a pharmaceutically acceptable salt, enantiomer or diastereomer thereof:
(IAB)

In this formula,
R ¹ is halogen or C _{1- 6} alkyl;
R &lt; ² &gt; is hydrogen or halogen;
R &lt; ³ &gt; is hydrogen or halogen;
R ⁴ is C _{1- 6} alkyl;
R &lt; ⁵ &gt; is hydrogen;
R &lt; ⁶ &gt; is hydrogen;
R ⁸ is -C _m H _2m - or a phenyl -, C _{3- 7} cycloalkyl, -C _m H _2m;
m is 1 to 6;

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